are paler than the rest of the plumage, being almost white in some
individuals. There is a broad red band round the neck and the lower part
of the head. This at the breeding season becomes very brilliant, and
then looks like a broad collar of crimson velvet. The legs of the sarus
are also bright red and are nearly a yard long. So that the sarus can,
when he wishes to assert himself, look over the head of the average
human being without unduly stretching his neck.
The sarus is the only crane that stays in India throughout the year. As
has already been said, the species is very common in Northern India;
indeed, a broad stretch of landscape in that part of the world would not
seem true to life did it not contain a pair of saruses standing near
together. Every pair of these birds is a regular Darby and Joan. There
are instances on record of a sarus having pined away and died because it
had lost its mate. This affection of the male and female who pair for
life is so notorious that the Indians who eat the flesh of these birds
make a point, after they have bagged one of a pair, of killing the mate.
The food of saruses is, as Hume remarks, very varied. No small reptile
or amphibian comes amiss to them. They also eat insects and snails, and
seeds and green vegetable matter. They are often to be observed feeding
at some distance from water. Indeed, my experience is that they are seen
more often on dry land than in water. Their long legs appear to be of
little use to them except at the nesting season, when they are necessary
in order to enable the birds to wade to the nest. Cranes, unlike storks
and herons, cannot grip with the foot, so that they never perch in
trees. The nest is built on the ground and, presumably for the sake of
protection against jackals, wolves, and such-like creatures, is usually
surrounded by water. As a rule, it is not constructed on an island, but
is itself an islet rising from the bottom of the _jhil_ or tank in which
it is situated.
I have not had the good fortune to witness a nest of the sarus in course
of construction, but from the behaviour of the owners when heavy rain
falls after the nest is completed, I believe that both sexes take part
in construction. As the nesting season is in June, July, August, and
September, a good deal of rain usually falls while nesting operations
are going on. The nest is a mound or cone, composed of rushes and reeds,
of which the diameter is two feet at least. The top of this cone, on
which the eggs are placed, is usually about a foot above the surface of
the water. Thus the eggs lie only a little above the water level;
nevertheless, they always feel quite dry, as does the layer of rushes on
which they are placed. This is rather surprising—one would expect the
water to get soaked up into the parts of the nest above the surface; but
this does not happen. It is needless to say that if the top of the nest
became submerged it would be impossible to keep the eggs dry; hence,
when very heavy rain causes the water level round the nest to rise, the
parent saruses raise the top of the nest by adding more material to it.
Two eggs are usually laid. These, as befits the size of the owners, are
very large. It is as much as one can do to make both ends meet of a tape
eleven inches long, passed round the long axis of the egg. The eggs vary
considerably in size, but are usually of a creamy hue, They may be with
or without markings. The shell is very thick and hard, so that if
sarus’s eggs were used for electioneering purposes, fatalities would
often occur.
Various observers give very different accounts of the behaviour of the
parent saruses when their nest is attacked. The general experience is
that they show no fight, but that they retire gracefully as soon as the
human being gets within twenty yards of the nest. Hume, however, records
one case of a sitting sarus making such vigorous pokes and drives at the
man who approached her when sitting on the nest that he was forced to
flap her in the face vigorously with his waist cloth before she left her
eggs. That, says Hume, is the nearest approach to a fight for its
_penates_ he has ever seen a sarus make. Recently I visited a nest of
these birds, which was situated in a small patch of water, perhaps forty
feet square, with a millet field on one side and paddy on the other
three. I was on horseback, not wishing to wade nearly to my waist. With
me were three men. When we first noticed the nest, the hen was sitting
on it and the cock standing near by. As we approached the female rose to
her feet very slowly, and then I could see that the nest contained a
young one. When we were at a distance of some ten yards the female began
to move her feet as if scraping the nest, and the young bird betook
itself quietly to the water, and swam slowly into the neighbouring
flooded paddy field. The hen then slowly descended from the nest into
the water and quietly walked off. On reaching the nest, I found in it
one egg. I sent one of the men after the youngster, which he quickly
secured and brought to me to look at. It was about the size of a small
bazaar fowl, and had perhaps been hatched three days. It was covered
with soft down. The down on the upper parts was of a rich reddish fawn
colour, the back of the neck, a band along the backbone, and a strip on
each wing being the places where the colour was most intense; these were
almost chestnut in hue. The lower parts were of a cream colour, into
which the reddish fawn merged gradually at the sides of the body. The
eyes were large and black. The bill was of pink hue and broad at the
base where the yellow lining of the mouth showed. The pink of the bill
was most pronounced towards the base, fading almost to white at the tip.
The legs and feet were pale pink, the toes being slightly webbed. Even
at that stage of the youngster’s existence the legs were long, and
enabled him to swim with ease, but they were not strong enough to
support him when he tried to walk. Sarus cranes cannot walk properly
until they are several months old.
While I was handling the young bird the cock sarus was evidently
summoning up his courage, for presently he began to advance in battle
array, that is to say, with neck bent, so that the head projected
forward, mouth slightly open, and wings about half expanded. Thus he
slowly approached, looking very handsome. He did not advance direct, but
took a circuitous course as if stalking us. When he had approached
within about six feet I made a pretence of striking him with a short
cane. Of this act of hostility he took not the least notice, but
continued to approach. The men with me, who were on foot, began to fear
being attacked, so one of them pulled up some paddy stalks and threw
these at him. This made him jump and retreat a few paces. But he soon
recommenced his advance in battle array. Then one of the men rushed at
him. That caused him to retreat a few paces hastily, but with dignity.
He then proceeded to attempt a rear attack, and as he circled round us
with bent neck he put me in mind of the villain of the melodrama, who
stalks about saying “My time will come!” When the sarus had advanced
thus to within four feet of my men and looked as though he were about to
spring at them, one of these lunged at him with a short stick, and he
would have been struck had he not beaten a hasty retreat. Nothing
daunted, he again returned to the attack. We were at the nest for fully
ten minutes, and the whole time he was trying to get at us. Only once
did he utter his trumpet-like call. The female meanwhile remained
watching at a distance of perhaps forty yards.
Having seen what we wanted, we replaced the young bird and the egg in
the nest and retreated fifteen or twenty yards. We waited to see what
the parent birds would do. The female came up to the cock (she is
distinguishable by her smaller size); then they both advanced very
slowly towards the nest, the hen approaching the faster. When at a
distance of perhaps eight yards from the nest, the cock indulged in some
curious antics. He slowly drew himself up to his full height and stood
thus motionless for a few seconds, then he stretched out his bill
towards the sky. Next, the long neck began to bend slowly until it took
roughly the shape of the letter S. Then, while the neck was still so
bent, the sarus dipped his bill into the water. After this he again
stood upright and repeated the whole performance. Finally he indulged in
a little dance. Meanwhile the hen slowly advanced, and when within a
yard of the nest stood still and contemplated it for a little, then,
after caressing the youngster with her bill, she slowly climbed on to
the nest. The nest cavity being a very shallow one, the young bird
sitting in it could be seen from a considerable distance, and its
reddish fawn plumage showed up in strong contrast to its surroundings.
The sarus nestling cannot by any stretch of the imagination be called
protectively coloured, but it fares very well, notwithstanding its
conspicuousness, because its parents never depart far from the nest, and
while they are present it is immune from attack. Even large birds of
prey avoid the powerful beak of an infuriated crane.
XXXII
THE SWALLOW-PLOVER
Terns are so beautiful that, where they occur, they are apt to attract
unto themselves all attention. This is, I think, the reason why so
little is on record regarding the swallow-plovers, which haunt all the
larger rivers of India to such an extent that it is scarcely possible to
spend an hour on the Ganges, the Jumna, the Gogra, the Indus, the
Brahmaputra, the Nerbudda, the Mahanuddy, or even the distant Irawaddy
without meeting with a flock of those curious little birds.
Swallow-plovers, or pratincoles, as they are often called, are easily
described. They are plovers that subsist largely upon flying insects
which they catch when on the wing. As a result of this habit
swallow-plovers (_Glareola lactea_) have taken on some of the attributes
of the swallow, notably the long wings and the broad gape.
The total length of a swallow-plover, including the tail, is 6½ inches,
while the wing alone is nearly six inches long. It is these long wings
that give the bird a swallow-like appearance.
The general hue of _Glareola lactea_ is that curious sandy-grey shade of
brown which, for some occult reason, is known as isabelline. The short
tail is white with a black tip. There is a black streak through the eye
and a white one near the margin of the wing. The abdomen is white. The
legs are short for those of a plover; nevertheless, the species is very
nimble on its feet, and runs in the manner peculiar to the peewit
family.
Swallow-plovers are to be found at a distance from water, but they are
essentially river birds.
At sunset, when insects in their myriads disport themselves over the
surface of rivers, the swallow-plovers issue forth and hawk these flying
hexapods just as swallows do, and, as they fly low over the face of the
waters, they are doubtless often mistaken for swallows.
Jerdon states that swallow-plovers live exclusively on insects which
they catch on the wing. I doubt whether this assertion is correct. These
birds certainly feed largely on flying insects, but as they spend the
major part of their time on the sand, over which they run swiftly, I
think that creeping things constitute a not inconsiderable portion of
their diet.
Their nesting habits are similar to those of terns and plovers; that is
to say, the eggs are placed on the sand or bare ground without any
semblance of a nest.
I make a point every year, if possible, of spending a morning on a river
at the beginning of the hot weather looking for the nests of terns and
other birds which lay on _churs_ and sandbanks. Almost every Indian
river is plentifully studded with islets which render its navigation
difficult, but afford most convenient nesting sites for many species of
birds. The sandy islets whereon eggs are laid are nearly always those of
which some portion is sufficiently high to escape being flooded when the
river rises in consequence of the melting of the snow on the higher
peaks of the Himalayas. The selected islands are almost invariably
sufficiently far from the river bank to prevent jackals and other
predaceous creatures wading across to them. If terns or plovers fail to
take such precautions, the chances are that their eggs will come to
grief.
This year (1912), on the 15th April, I went out on the Gogra at Fyzabad,
and found over thirty nests of swallow-plovers on one islet, on which I
also saw two eggs of the black-bellied tern (_Sterna melanogaster_).
Immediately I set foot on the island the terns and small pratincoles
commenced making an uproar, which, of course, amounted to an assurance
that they had eggs on the island. One portion of it was well sprinkled
with stunted vegetation, and thither I at once repaired, to the great
disgust of the swallow-plovers, who flew about excitedly, uttering their
lapwing-like cry—_titeri, titeri_. A search of less than a minute served
to reveal a couple of eggs placed on the bare ground between two small
plants that were growing out of the sand. As I stooped down to examine
these eggs I looked round and saw a very curious and pretty sight.
Swallow-plovers were surrounding me. They were nearly all on the ground
and striking strange attitudes. Some were lying on the sand as though
they had been wounded and fallen to the ground; others were floundering
on the ground as if in pain; some were fluttering along with one wing
stretched out limply, looking as though it were broken; while others
appeared to have both wings injured. I did not count the birds, but at
least twenty of them were seemingly injured. I had often seen one bird
or a pair behave thus, but never a whole flock.
All the plover family have this injury-feigning instinct, but in none is
it so well developed as in the pratincoles.
“The strange antics,” writes Hume, “played by these little birds, at
least those of them that had young or hard-set eggs, whenever we
approached their treasures were very remarkable; flying past one, they
would come fluttering down on to the sand a few paces in front of one,
and there gasp and flutter as if mortally wounded, hobbling on with
draggled wings and limping legs as one approached them, and altogether
simulating entirely helpless and completely crippled birds. No one
unacquainted with the habits of this class of birds could have believed,
to see them flapping along on the sands on their stomachs, every now and
then falling head over heels and lying quite still for an instant, as if
altogether exhausted, that this was all a piece of consummate acting
intended to divert our attention from their nests.”
Hume here voices the popular opinion that birds, when they behave as
though they are injured, are deliberately pretending to be wounded with
the object of diverting the attention of an intruder from their eggs or
young. I hold this view to be utterly and entirely wrong. Consider the
long chain of reasoning that a bird has to make before behaving as
swallow-plovers are supposed to do. In the first place the birds must
know or believe that the intruder has come with the object of taking
their eggs or young ones. They must know or believe that the said
intruder would like to capture them in preference to their eggs or
young. They must further have discovered that a bird with a leg or a
wing broken is easier to capture than one that is sound in limb. They
must also know how a bird with a broken wing or leg behaves when
endeavouring to escape from a foe. Knowing and believing all these
things, the swallow-plover must reason thus within itself: “If I pretend
that I am injured the intruder will try to catch me and thus be drawn
away from my eggs or young. I will, therefore, proceed to act the
wounded bird to the best of my ability.”
I do not for a moment believe that the average swallow-plover has half
this knowledge and power of reasoning. Its behaviour can be accounted
for in a far more probable manner. We all know that instinct teaches
birds to fly away from all birds or beasts of prey or large strange
moving objects; but instinct teaches them to guard their eggs. Now, when
a human being approaches the eggs of a pratincole, these two instincts
come into violent opposition, and the bird’s mental equilibrium is much
disturbed; the result is that the bird undergoes all manner of strange
contortions. We look at these and say, “What a clever little bird! How
well it is acting!” The contortions of the swallow-plover undoubtedly do
tend to attract the attention of predaceous creatures, and are probably
useful to the species when there are young, for these are able to slip
away while the attention of the attacker is momentarily diverted by the
parent birds. Hence such behaviour must tend to be perpetuated by
natural selection. That it is in no sense an intelligent act is obvious
from the fact that such behaviour occurs when there are eggs, and so can
do no good; moreover, the parents will go on behaving in this manner
even after the intruder has taken the eggs and put them in his pocket!
Textbooks tell us that _Glareola lactea_ lays from two to four eggs. I
have never found more than two in a clutch, and think that Hume made a
mistake when he said “from two to four,” and as plagiarism is very rife
among writers on ornithology, other ornithologists have copied his
statements without acknowledgment, and, of course, reproduced his
mistake!
The eggs of this species are interesting on account of the extraordinary
variations they exhibit. As Hume well says, it is scarcely possible to
find two eggs (outside the same clutch) that closely resemble each
other. It not infrequently happens that the two eggs in the same clutch
differ so greatly that it is difficult to believe that they are the
produce of one hen. The ground colour may vary from pale green, almost
white, to fawn colour. The markings sometimes take the form of blotches,
so that the eggs look like those of a small tern. More usually the
markings appear as tiny spots, freckles, pencillings, or cloudy smudges.
On a sandbank containing twenty nests it is possible to pick out ten
eggs, each of which differs so greatly from the others that the casual
observer would certainly say they all belonged to different species. The
size is, of course, fairly uniform, but the shape varies greatly; some
are elongated, while others are nearly as broad as they are long.
Occasionally a pear-shaped egg is found, but as a rule the narrow end of
the egg is comparatively blunt. That eggs which are laid on the sand in
the open should display these extraordinary variations is an awkward
fact for those who consider that the colouring of birds’ eggs is the
direct result of natural selection. If this were so we should expect to
find a wonderful sameness about the eggs of this species, which are laid
in such exposed situations. The fact is, of course, that on a sandbank
eggs of any colour that is not too pronounced are difficult to see;
hence, for purposes of protection, the actual colours of the background
and the markings of the egg are matters of little importance.
XXXIII
THE BIRDS OF A MADRAS GARDEN
Richard Jefferies devotes several chapters of one of the most delightful
of his books—_Wild Life in a Southern County_—to the birds that frequent
a farm on the Downs. “On looking back,” he writes, “it appears that the
farm-house, garden, orchard, and rickyard at Wick are constantly visited
by about thirty-five wild creatures, and, in addition, five others come
now and then, making a total of forty. Of these forty, twenty-six are
birds, two bats, eight quadrupeds, and four reptiles. This does not
include some few additional birds that only come at long intervals, nor
those that simply fly overhead or are heard singing at a distance.
“Around the farm-house itself come the starlings, sparrows, swallows,
water wagtails, hedge-sparrows, robins, wrens, tomtits, thrushes, and
blackbirds. The orchard is frequented by sand martins, cuckoos, missel
thrushes, goldfinches, greenfinches, flycatchers, linnets, blackcaps,
and titmice.
“In the rickyard are seen redstarts, stone-chats, rooks, chaffinches,
wood-pigeons, doves, and larks.”
Now a closer observer of nature than Richard Jefferies never existed,
and he knew every square yard of the Wick Farm, so that we may be sure
that the list he gives is exhaustive.
This list seems very meagre to one who is accustomed to bird life in
India. If the Wick Farm were transported bodily and set down in the
middle of India it would be visited by seventy or eighty species of
birds instead of twenty-six.
Every garden of tolerable size in Madras is the abode of quite twice as
many birds as those which visit a downland farm in England, so superior
is India to England as a field for the ornithologist.
Every Madrassi whose bungalow is placed in a garden worthy of the name
may, without leaving the same, count upon seeing fifty species of birds
before he has been many months in the country.
First there are the perennials—the birds which, like the poor, are
always with us—the jungle and the house crows, the white-headed babbler,
the iora, the red-vented and the white-browed bulbuls, the king-crow,
the tailor bird, the common and the brahmany mynas, the common sparrow,
the golden-backed woodpecker, the bush lark, Loten’s and the
purple-rumped sunbirds, the coppersmith, the white-breasted kingfisher,
the hoopoe, the koel, the crow-pheasant, the spotted owlet, the common
and the brahmany kites, the spotted and the little brown doves, and the
cattle egret; while if the garden boast of anything in the shape of a
pond there will be found the common kingfisher and the paddy bird.
Nearly all these birds nest in the compound, and all are so familiar to
every Anglo-Indian that no description is needed. Moreover, I have, I
think, previously treated of all of them with the exception of the iora
(_Aegithina tiphia_). In case there be any who are unable to give this
beautiful little species a name when they see or hear it, let me briefly
describe it. It is considerably smaller than a sparrow, and lives amid
the foliage, from which it picks the tiny insects that constitute its
food. In summer the upper parts of the cock are black, and the lower
parts bright yellow. There are two narrow white bars in the wing. In
winter the black on the head and back is replaced by yellowish green.
The hen has the upper plumage and tail green, and the lower parts
yellow. She also has the two white wing bars. To my mind the iora is a
good songster. Nevertheless, “Eha” states that it “has no song, but
scarcely any other bird has such a variety of sweet notes.” I will not
quarrel over the meaning of the word song; every one who knows the iora
must agree that it continually makes a joyful noise.
Less common than the birds named above, but occupants of almost every
garden, are the butcher birds and their cousins the wood-shrikes, the
fantail flycatchers, and the pied wagtails, the emerald bee-eaters, and
parakeets, the robin and the palm swift.
The commonest species of butcher bird in Madras is the bay-backed shrike
(_Lanius vittatus_), a small bird with a grey head and a maroon back,
and a broad black streak through the eye. This tyrant of the garden
takes up a perch on a bare branch, and there remains like a sentinel on
a watch-tower, until it espies an insect on the ground. On to this it
swoops, displaying, as it descends, much white in the wings and the
tail.
The wood-shrike (_Tephrodornis pondiceranus_) frequents trees and
hedgerows. But for its broad white eyebrow and the white in its tail, it
might pass for a sparrow. It is most easily recognised by its melodious
and cheerful call—_tanti tuia, tanti tuia_.
The pied wagtail (_Motacilla maderaspatensis_)—elegance
personified—loves to sit on the housetop and pour forth a lay which vies
with that of the canary. Suddenly away it flies, speeding through the
air in undulating flight, until it reaches the ground, where,
nimble-footed as Camilla, it chases its insect quarry.
The fantail flycatcher (_Rhipidura albifrontata_) is another study in
black and white. This most charming of birds frequents leafy trees,
whence it pours forth its sweet song of six or seven notes. Every now
and again it, after the manner of all flycatchers, sallies into the air
after insects. Having secured its victim, it alights on a branch or on
the ground, and there spreads out its tail and turns as if on a pivot,
now to one side, now to the other.
We must seek the robin (_Thamnobia fulicata_) among the tangled
undergrowth in some corner of the compound neglected by the gardener.
There shall we find the pair of them—the cock a glossy black bird with a
narrow white bar in the wing, the hen arrayed in a gown of reddish
brown. In each sex there is a patch of brick-red feathers under the
tail, and, as if for the purpose of displaying this, the tail is carried
almost erect.
If there be any fruit ripening, even if it be that of the cypress, green
parrots (_Palaeornis torquatus_) are certain to visit the garden. On the
approach of a human being these feathered marauders will fling
themselves into the air with wild screams, and dash off, looking, as
Lockwood Kipling says, like “live emeralds in the sun.”
Even more like living emeralds are the little green bee-eaters (_Merops
viridis_), whose feeble twitter may emanate from any tree. Take a huge
emerald and cut it into the shape of a bird. Insert a pale blue
turquoise at the throat, rubies for the eyes, and set these off with
strips of darkest emery, let into the head a golden topaz, then breathe
into this collection of gems the breath of life, and you will have
produced a poor imitation of that gem of the feathered world—the little
emerald merops.
If there be palm trees in the garden the presence of the little palm
swift (_Tachornis batassiensis_) is assured. Palm swifts are tiny
smoky-brown birds which travel unceasingly through the air in pursuit of
the insects on which they feed. During flight the wings remain expanded,
looking like a bow into the middle of which the slender body is
inserted.
I had almost forgotten one of the most striking birds in the world—the
Indian paradise flycatcher (_Terpsiphone paradisi_), which certainly is
entitled to a place among the common birds of a Madras garden. The cocks
are white or chestnut, according to age. The crested head is shining
black, and the two median tail feathers are greatly elongated, so that
they flutter in the air like satin streamers as the bird flits about
among the trees. The hen lacks the lengthened tail feathers, and, as
“Eha” says, looks like a chestnut-coloured bulbul. Indeed, Anglo-Indian
boys call this species the _Shah Bulbul_.
There are a number of occasional bird visitors to our Madras gardens.
Parties of minivets and cuckoo shrikes come and seek for insects among
the leaves of trees. The unobtrusive yellow-throated sparrow (_Gymnorhis
flavicollis_) is another tree-haunting species to be looked for in the
garden. Conspicuous among the less common birds which feed on the ground
are the gorgeous roller or “blue jay,” the sprightly magpie robin, the
white-throated munia, attired like a quaker, and that bird of many
colours the Indian pitta, which keeps always near thick underwood,
sometimes issuing from thence into the open to give forth a cheery
whistle.
In conclusion, mention must be made of the migrant species. Many of the
birds that come to the farm on the downs of which Jefferies wrote—the
swallows, the cuckoos, and the wagtails—are but summer visitors to
England. So do a number of migrating species visit our Madras gardens.
There is, however, this difference in the two cases. The migrating
species visit England in summer for nesting purposes, whereas they spend
the winter in warm Madras, and leave it in summer before the nesting
time begins.
Among the winter visitors which come into the garden must be mentioned
the beautiful Indian oriole, a study in yellow and black, the Indian
redstart, or, to give it its older name, the fire-tail, the grey-headed
wagtail, whose under parts are bright yellow, the dull earthy-hued
little Sykes’s warbler, which hides itself in a bush and keeps on
calling out _chick_, and the grey-headed myna, which, but for the fact
that the head and recumbent crest are grey, might easily pass for a
brahmany myna.
The birds above enumerated do not form by any means an exhaustive list.
Were birds that sometimes come into the garden included, the list would
extend to three times its present length.
XXXIV
SUNBIRDS
Sunbirds, or honey-suckers as they are sometimes called, are to the
tropics of the Old World what humming birds are to the warmer portions
of the New World.
Sunbirds are tiny feathered exquisites which vary in length from 3½ to 5
inches, including a bill of considerable length for the size of the
bird.
They are numbered among the most familiar birds of India, owing to their
abundance and their partiality to gardens. They occur all the year round
in the warmer parts of the peninsula, but leave the coldest regions for
a short time during the winter.
Twenty-nine species of sunbirds are described as belonging to the Indian
Empire, but most of them are only local in their distribution. Three
species, however, have a considerable range. These are _Arachnechthra
asiatica_, the purple sunbird, which occurs throughout India and Burma,
ascending the hills to 5000 feet; _A. zeylonica_—the purple-rumped
sunbird—which is the commonest sunbird in all parts of Southern India
except Madras, where the third species, _A. lotenia_—Loten’s sunbird—is
perhaps more abundant.
The genus _Arachnechthra_ is characterised by a great difference in
appearance between the sexes. The hens of all the species are very like
one another; all are homely-looking birds, dull greenish brown above and
pale yellow below. The cocks of the various species are arrayed in
metallic colours as resplendent as those that decorate humming birds.
Seen from a little distance, the cock of the purple-rumped species is a
bird with dark head, neck, wings, back, and tail, and bright yellow
under parts, while the female is brown above and yellowish beneath. Thus
at a distance the male does not look much more beautiful than the
female, but if one is able to creep up sufficiently near him his plumage
is seen to be unsurpassable; it glistens with a splendid metallic sheen,
which is purple or green according to the direction from which the sun’s
rays fall upon it. On the top of the head is a patch of brilliant
shining metallic green, which exceeds in beauty any crown devised by
man.
The cocks of the purple and Loten’s species are very much alike, but may
be readily distinguished by the fact that the slender curved bill of
Loten’s is considerably longer than that of its cousin. How shall I
describe these beautiful birds? In my volume _Indian Birds_ I classed
them among black birds, because they look black when seen at a distance,
but I stated that they are in reality dark purple, and have been taken
to task for not classing them among the blue birds. The fact of the
matter is that these birds cannot be said to be of any colour; like shot
silk, their hue depends upon the angle at which the sun’s rays fall upon
them. In the sunlight their plumage glistens like a new silk hat, and
sometimes the sheen looks lilac and at others green.
The habits of all three species appear to be exactly alike.
The cocks of all have fine voices. At his best the purple sunbird sings
as sweetly as a canary. Indeed, on one occasion when I was staying at
Bangalore I heard a bird singing in the verandah which I thought was a
caged canary; it was only when I went to look at the canary that I
discovered it to be a wild sunbird pouring forth its music from some
trellis-work!
Sunbirds are always literally bubbling over with energy. They are
bundles of vivacity—ever on the move. Although they eat tiny insects,
they subsist chiefly on the nectar of flowers, which appears to be a
most stimulating diet.
Sunbirds have long, slender, curved bills and tubular tongues, hence
they are admirably equipped to secure the honey hidden away in the
calyces of flowers. As the little birds insert their heads into the
blossoms they get well dusted with pollen, so that, like bees and some
other insects, they probably play an important part in the
cross-fertilisation of flowers; but they do not hesitate to probe the
sides of large flowers with their sharp bills, and thus secure the honey
without bearing pollen to the stigma. It is pretty to watch the sunbirds
feeding. They are as acrobatic as titmice and strike the most
extraordinary attitudes in their attempts to procure honey. When there
is no convenient _point d’appui_ they hover like humming birds, on
rapidly vibrating wings, and while so doing explore with their long
tongues the recesses of honeyed flowers. To quote Aitken, “between
whiles they skip about, slapping their sides with their tiny wings,
spreading their tails like fans, and ringing out their cheery refrain.
As they pass from one tree to another they traverse the air in a
succession of bounds and sportive spirals.” Verily the existence of a
sunbird is a happy one!
The nest of the sunbird is one of the most wonderful pieces of
architecture in the world, and it is the work of the hen alone. While
she is working like a Trojan, her gay young spark of a husband is
drinking riotously of nectar! The nest is a hanging one, and is usually
suspended from a branch of a bush or a tree, and not infrequently from
the rafter of the verandah of an inhabited bungalow; sunbirds show
little fear of man.
The nest is commenced by cobwebs being wound round and round the branch
from which the nest will hang. Cobweb is the cement most commonly
employed by birds. To this pieces of dried grass, slender twigs, fibres,
roots, or other material are added and made to adhere by the addition of
more cobweb.
The completed nest, which usually hangs in a most conspicuous place,
often passes for a small mass of rubbish that has been pitched into a
bush, and, in view of the multifarious nature of the material used by
the sunbird, there is every excuse for mistaking the nursery for a ball
of rubbish. Grasses, fibres, fine roots, tendrils, fragments of bark,
moss, lichen, petals or sepals of flowers, in short, anything that looks
old and untidy is utilised as building material.
In _Birds of the Plains_ I mentioned the sunbirds’ nest that was
literally covered with the white paper shavings that are used to pack
tight the biscuits in Huntley and Palmer’s tins.
“It is curious,” writes Mr. R. M. Adam, “how fond these birds are of
tacking on pieces of paper and here and there a bright-coloured feather
from a paroquet or a roller on the outside of their nests. When in Agra
a bird of this species built a nest on a loose piece of thatch laid in
my verandah, and on the side of the nest, stuck on like a signboard, was
a piece of a torn-up letter with ‘My dear Adam’ on it.”
Mr. R. W. Morgan describes a yet more extraordinary nest that was built
by sunbirds in an acacia tree in front of his office at Kurnool: “It was
ornamented with bits of blotting-paper, twine, and old service stamps
that had been left lying about. The whole structure was most compactly
bound together with cobwebs, and had a long string of caterpillar
excrement wound round it. This excrement had most probably fallen on to
a cobweb and had stuck to it, and the cobweb had afterwards been
transported in strips to the nest.”
The completed nest is a pear-shaped structure, with an opening at one
side near the top. Over the entrance hole a little porch projects, which
serves to keep out the sun and rain when the nest is exposed to them.
The nest is cosily lined with silk cotton. The aperture at the side acts
as a window as well as a door; the hen, who alone incubates, sits on her
eggs, looking out of the little window with her chin resting comfortably
on the sill.
Two eggs only are laid. The smallness of the clutch indicates that there
is not a great deal of loss of life in the nest. The immunity of the
sunbird is due chiefly to the inaccessibility of the nest. The latter is
usually at the extreme tip of a slender branch upon which no bird of any
size can obtain a foothold. When a sunbird does make a mistake and place
its nest in an unsuitable place, the predaceous crows devour the young
ones, as they did recently in the case of a nest built in the middle of
an ingadulsis hedge in my compound at Fyzabad.
In conclusion, I should like to settle one disputed point in the economy
of the purple sunbird (_A. asiatica_). Jerdon stated that the cock doffs
his gay plumage after the breeding season and assumes a dress like that
of the hen except for a purple strip running longitudinally from the
chin to the abdomen.
Blanford denied this. He appears to have based his denial on the fact
that cocks in full plumage are to be seen at all seasons of the year.
There is no month in the year in which I have not seen a cock purple
sunbird in nuptial plumage. I used, therefore, to think that Blanford
was right and Jerdon wrong.
Afterwards I came across the following passage by Finn in _The Birds of
Calcutta_: “The purple cock apparently thinks his wedding garment too
expensive to be worn the whole year round; for after nesting he doffs
it, and assumes female plumage, retaining only a purple streak from chin
to stomach as a mark of his sex. . . . I well remember one bird which
came to the museum compound after breeding to change his plumage; he
kept very much to two or three trees, singing, apparently, from one
particular twig, and even when in undress he kept up his song.”
Since reading the above I have watched purple sunbirds carefully, and
have observed that during the months of November and December cocks in
full breeding plumage are very rarely seen, although there is no lack of
cocks in the eclipse plumage described by Finn.
Moreover, a purple sunbird which is being kept in an aviary in England
assumes eclipse plumage for a short period each year at the beginning of
winter. Thus there can be no doubt that the cock of the purple species
does doff his gay plumage after the nesting season, but only for a short
period. In January the majority of cocks are in breeding plumage, and,
indeed, in some parts of the country nest building begins as early as
February.
XXXV
THE BANK MYNA
The bank myna (_Acridotheres ginginianus_), like the Indian corby
(_Corvus macrorhynchus_), is a bird that has suffered neglect at the
hands of those who write about the feathered folk. The reason of this
neglect is obvious. Even as the house crow (_Corvus splendens_)
overshadows the corby, so does the common myna (_Acridotheres tristis_)
almost eclipse the bank myna. So familiar is the myna that all books on
Indian birds deal very fully with him. They discourse at length upon his
character and his habits, and then proceed to dismiss the bank myna with
the remark that his habits are those of his cousin.
The bank myna is a myna every inch of him. He is a chip of the old
block; there is no mistaking him for anything but what he is. So like to
his cousin is he that when I first set eyes upon him I took him for a
common myna freak. And I still believe I was not greatly mistaken. I
submit that the species arose as a mutation from _A. tristis_.
Once upon a time a pair of common mynas must have had cause to shake
their heads gravely over one or more of their youngsters who differed
much from the rest of the brood. As these youngsters grew up, the
differences became even more marked, they showed themselves slaty grey
where they should have been rich brown, and pinkish buff where white
feathers ought to have appeared, and the climax must have been reached
when these weird youngsters developed crimson patches of skin at the
sides of the head, instead of yellow ones. Probably, the other mynas of
the locality openly expressed their disapproval of these caricatures of
their species, for mynas do not keep their feelings to themselves. As
likely as not they put these new-fangled creatures into Coventry, for
birds are as conservative as old maids.
Thus these myna freaks were compelled to live apart, but, being strong
and healthy, they throve and either paired _inter se_, or managed to
secure mates among their normally dressed fellows. In either case, the
offspring bore the stamp of their abnormal parents.
It is a curious fact, and one which throws much light on the process of
evolution, that abnormalities have a very strong tendency to perpetuate
themselves. Thus was brought into being a new species, and as there were
in those times no ornithologists to shoot these freaks, and as they
passed with credit the test prescribed by nature, the species has
secured a firm footing in India. This hypothesis accounts for the
comparatively restricted distribution of the bank myna. It does not
occur south of the Narbada and Mahanadi Rivers, but is found all over
the plains of Northern India, and ascends some way up the Himalayas. It
is particularly abundant in the eastern portion of the United Provinces.
In the course of a stroll through the fields at Allahabad, Lucknow, or
Fyzabad, one meets with thousands of bank mynas. There seems to be
evidence that this species is extending its range both eastwards and
westwards; and one of these days a southerly advance may be made, so
that eventually the bank myna may form an attractive addition to the
birds of Madras.
This species goes about in flocks of varying numbers, after the fashion
of the common myna. It comes into towns and villages, but is much less
of a garden bird than its familiar cousin. It is in the fields,
especially in the vicinity of rivers, that these birds occur most
abundantly. They consort with all the other species of myna, for,
whatever may have been thought of them when first evolved, they are now
in society. King-crows (_Dicrurus ater_) dance attendance upon them as
they do on the common mynas, for the sake of the insects put up by them
as they strut through the grass. The king-crow, owing to the length of
its tail and the shortness of its legs, is no pedestrian, and so is not
able to beat for itself.
The books tell us that bank mynas feed on insects, grain, and fruit. I
am inclined to think that their diet is confined almost exclusively to
the first of these articles. I speak not as one having authority, for,
in order to do this, it is necessary to shoot dozens of the birds and
carefully examine the contents of their stomachs. This kind of thing I
leave to the economic ornithologist. I admit that bank mynas are very
partial to the fields of millet and other tall grain crops, but I am
persuaded that they visit these for the insects that lurk on their
spikes.
Grasshoppers are to the common myna what bread and meat are to the
Englishman, the _pièces de résistance_ of the menu. This is why mynas
always affect pasture land, where it exists, and keep company with
cattle, the sedate march of which causes so much consternation among the
grasshoppers. Bank mynas eat grasshoppers, but seem to prefer other
insects, especially those which lurk underground.[3] Certain it is that
wherever they occur they maintain a sharp look-out for the ploughman,
and follow him most assiduously as he turns up the soil by means of his
oxen-drawn plough. The house crows also attend this function. The other
species of myna follow the plough, but not so consistently as the bank
myna. The pied starling, although it does not disdain the insects cast
up by the plough, seems to prefer to pick its food out of mud. One often
sees a flock of these birds paddling about in shallow water, as though
they were sandpipers.
It is amusing to watch a flock of bank mynas strutting along a newly
turned furrow. In Upper India it is usual for two or more ploughs to
work together in Indian file, a few yards separating them. The mynas
like to place themselves between two ploughs, and so fearless are they
that they sometimes allow themselves almost to be trodden on by the team
behind them. Although the progress of the ploughing oxen is not rapid,
it is too fast for the mynas, who find themselves continually dropping
behind, and have every now and again to use their wings to keep pace
with them. At intervals, the whole following, or a portion of it, takes
to its wings and indulges in a little flight purely for the fun of the
thing. The flock sometimes returns to the original plough, at others
transfers its attentions to another. Thus the flocks are continually
changing in number and personnel, and in this respect are very different
from the companies of seven sisters. The latter appear to be definite
clubs or societies, the former mere chance collections of individuals,
or probably pairs of individuals.
Bank mynas are so called because they invariably nest in sandbanks, in
the sides of a well, or some such locality, they themselves excavating
the nest hole. Like sand martins, bank mynas breed in considerable
companies, but they are not so obliging as regards the season of their
nidification. They usually select sites which are not only at a distance
from human habitations, but difficult of access, and, as the birds do
not begin to nest until well on in May, when the weather in Upper India
is too hot to be described in literary language, one does not often have
a chance of seeing the birds at work. Their nesting passages do not
necessarily run inwards in a straight line. The result is that
neighbouring ones often communicate. At the end of the passage is a
circular chamber which is lined with grass and anything else portable.
Cast-off snake skin is a lining particularly sought after. Mr. Jesse
informs us that from one of these nests in the bank of the Goomti, near
Lucknow, he extracted parts of a Latin exercise and some arithmetic
questions. The owners of the nest were not going in for higher
education; it was merely a case of putting a thing to a use for which it
was never intended, a feat at which both birds and Indian servants are
great adepts. Notwithstanding the fact that the eggs are laid in dark
places, they are blue, as are those of the other mynas. Young bank mynas
lack the red skin at the side of the head, and are brown in places where
the adults are black. Young mynas of all species have a rather mangy
appearance. Like port wine, they improve with age.
[3]Since the above was written, C. W. Mason has published a paper
entitled _The Food of Birds in India_. In this he shows that eight
stomachs of the bank myna contained 106 insects. His researches show
that this species is very partial to the caterpillars of the common
castor pest, _Ophiusa melicerte_. _Vide Memoirs of the Department of
Agriculture in India_ (Entomological Series, Vol. III).
XXXVI
THE JACKDAW
The jackdaw, although numbered among the birds of India, has not
succeeded in establishing itself in the plains. Large numbers of
jackdaws visit the Punjab in winter, where they keep company with the
house crows and the rooks, the three species appearing to be on the best
of terms. At the first approach of the warm weather the daws, the rooks,
and the majority of the ravens betake themselves to Kashmir or to
Central Asia, leaving the house crows to represent the genus _Corvus_ in
the plains of the Punjab. The jackdaw (_Corvus monedula_) is in shape
and colouring like our friend _Corvus splendens_, differing only in its
smaller size and in having a white iris to the eye. As is the case with
the common Indian crow, individual jackdaws differ considerably in the
intensity of the greyness of the neck. In some specimens the sides of
the neck are nearly white. Of these systematists have made a new
species, which they call _C. collaris_. Oates, I am glad to observe,
declines to recognise this species. A jackdaw is a jackdaw all the world
over, and it is absurd to try to make him anything else.
As it has not been my good fortune to spend any time in Kashmir, my
acquaintance with the jackdaws of India is confined to those that visit
the Punjab in winter. These do not appear to frequent the vicinity of
houses; I have invariably found them feeding in fields at some distance
from a village. They roost, along with the crows and the rooks, in
remote parts of the country. Every evening during the half-hour before
sunset two great streams of birds pass over Lahore. The larger stream,
consisting of crows, rooks, and daws, moves in a north-westerly
direction, while the other, composed exclusively of ravens, takes a more
westerly course. The ravens apparently decline to consort with their
smaller and more frivolous relations.
Although jackdaws seem never to remain in the plains after the beginning
of spring, they are able to thrive well enough in the hot weather. A
specimen in the Zoological Gardens at Lahore keeps perfectly well, and
loses none of his high spirits even when the heat is, to use the words
of Kipling, “enough to make your bloomin’ eyebrows crawl.” But then, as
Bishop Stanley asked, “who ever saw or heard of a moping, melancholy
jackdaw?” This particular bird is able to hold his own quite well
against the crows, rooks, and ravens confined in the same aviary.
Moreover, all these are on quite friendly terms with an Australian
piping crow—a butcher bird which apes the manners and appearance of a
crow so successfully as to delude the _Corvi_ into thinking that he is
one of themselves! Half a century ago Jerdon wrote: “The jackdaw is
tolerably abundant in Kashmir and in the Punjab, in the latter country
in the cold weather only. It builds in Kashmir in old ruined palaces,
holes in rocks, beneath roofs of houses, and also in trees, laying four
to six eggs, dotted and spotted with brownish black.” No one living in
Kashmir appears to have taken the trouble to amplify this somewhat
meagre account of the jackdaw in Asia. It would be interesting to know
whether the daws of Kashmir have any habits peculiar to themselves. The
fact that Jerdon mentions their breeding in trees is interesting, for in
England they nest in buildings in nine hundred and ninety-nine cases out
of a thousand.
The jackdaw makes a most admirable pet. When taken young it becomes
remarkably tame, soon learning to follow its master about like a dog.
Moreover, the bird is as full of tricks as is a wagon-load of monkeys,
so that Mr. Westell does not exaggerate when he says that the jackdaw
when kept as a pet seems more of an imp than a bird. It thieves for the
mere sake of thieving. The nest is sometimes a veritable museum of
curiosities. One bird, immortalised by Bishop Stanley, appears to have
tried to convert its nest into a draper’s shop, for this, although not
finished, was found to contain some lace, part of a worsted stocking, a
silk handkerchief, a frill, a child’s cap, “besides several other
things, but so ragged and worn out that it was impossible to make out
what they were.”
XXXVII
FIGHTING IN NATURE
A correspondent to _Country Life_ states that he has noticed that in the
various battles between ravens and golden eagles, which frequently take
place in the island of Skye, the golden eagles are always defeated.
He enquires whether this phenomenon is a usual one and how it is that
the comparatively weak raven can vanquish so powerful a bird as the
golden eagle.
The above statement and its attendant queries are the result of faulty
observation.
Such a thing as a battle between ravens and golden eagles has probably
never happened. If it did take place it could have but one ending—the
victory of the golden eagles.
Battles rarely, if ever, occur in nature between different species. In
order that a battle may take place it is necessary that each of the
opposing species should want the same thing and be ready to fight and,
if necessary, to sustain serious injuries in order to obtain that thing.
Now these conditions are rarely fulfilled except at the breeding season,
when males of the same species fight for the females.
The only other things over which fighting is likely to arise are food
and nesting sites.
It frequently happens that birds of different species want the same
food. But this rarely leads to anything in the nature of a battle. In
such contests the weaker almost invariably gives way to the stronger
without any fighting.
A familiar instance of this is afforded by the behaviour of the
white-backed (_Pseudogyps bengalensis_) and the black vultures (_Otogyps
calvus_) when they gather round a carcase.
Jesse writes, and my experience bears out what he says: “Often I have
been watching the vulgar white-backed herd, with a disreputable
following of kites and crows, teasing and fighting over a body, when one
of these aristocrats (i.e. _Otogyps calvus_), in his red cap and white
waistcoat, has made his appearance. Way is immediately made for him, the
plebeian herd slinking back as if ashamed or afraid, and I cannot
remember the last comer ever being obliged to assert his authority.”
If the smaller vultures, which are the more numerous, chose to combine,
they could drive off the black vultures, but in doing this some of them
would run the risk of sustaining injuries. Now, it seems to be a rule in
nature that no creature will willingly run such a risk. Rather than do
this an animal will flee before a comparatively puny adversary.
The instinct of self-preservation, which includes the preservation of
the body from injury, is strongly developed in all organisms. Natural
selection tends to develop this instinct, because the individuals in
which the instinct is strongly developed are less likely to be injured
by fighting than those which are pugnacious. In other words, it does not
pay to fight in nature. Injured individuals are seriously handicapped in
the struggle for existence. Thus natural selection tends to produce
cowards.
At the breeding season an instinct, which is ordinarily dormant in
birds, suddenly becomes active—the instinct of preserving the nest and
its contents.
This instinct, when aroused, frequently overmasters the instinct of
self-preservation, with the result that shy birds become bold, timid
ones grow aggressive, little birds which usually are terrified at the
close proximity of a human being allow themselves to be handled rather
than leave their eggs or young.
At the breeding season the desire to protect the nest leads many birds
to attack, or to make as if to attack, all intruders.
No sight is commoner in India than that of a pair of little drongos
(_Dicrurus ater_) chasing a kite or a crow.
Similarly I have witnessed doves chase and put to flight a tree-pie
(_Dendrocitta rufa_), and fantail flycatchers mob a corby (_Corvus
macrorhynchus_).
Nor are such cases confined to India.
In England Mr. A. H. Bryden states that he has seen sea-gulls mob and
put to flight so formidable a creature as a peregrine falcon.
In each of the above instances the bird pursued could, if it wished,
turn round and rend its puny adversaries. Why does it not do so? Because
the instinct of self-preservation is implanted in it so firmly.
This instinct teaches it never to resist an attack, no matter how feeble
the attacker be.
The object of the attack, provided it have no nest to defend, has
everything to lose and nothing to gain by resisting the attack and
giving battle. It matters little to a golden eagle on the look-out for
quarry in which direction it flies; hence if, while it is sailing
through the air, it is suddenly attacked by a couple of infuriated
ravens, the obvious course is for it to change the direction of its
flight. If it fail to do this it must either run the risk of being
severely pecked by the ravens or fight them and thereby expose itself to
injury. Under the circumstances it naturally chooses the line of least
resistance.
It is absurd to speak of a bird that behaves in this manner as being
defeated in battle. It does not suffer defeat. It merely declines to
give battle.
The general rule in nature is, “Never fight when a fight can be
avoided.”
This rule is unconsciously followed by all birds, except those that have
nests.
The most familiar example of the rule in operation is the well-known
habit of birds of surrendering their perches to new-comers. When
individual A flies to a perch occupied by individual B the latter almost
invariably gives way without demur. The particular perch is of no value
to the occupier, but a whole body may be a matter of life or death.
XXXVIII
BIRDS AND BUTTERFLIES
Biological science is at present in a rather peculiar position.
Biologists are divided into two parties. On the one side stand the
theorists and their followers; on the other the practical men who think
for themselves. At present, the theorists are the party in power (and
they are quite Lloyd-Georgian in their methods), while the practical
men, the breeders and the field naturalists, form the opposition. The
reason of the division is that many facts, that have come to light
lately, do not fit in with the theories that hold the field.
Now, when facts are discovered which militate against a theory the
proper course for the holder of the theory is to test carefully the
alleged facts, and if they prove to be really facts to discard or modify
his theory.
Unfortunately the professional biologists of to-day do not usually
follow this course. They have made fetishes of their theories, which
they worship as the Israelites worshipped the golden calf. The
consequence is that they feel in honour bound either to ignore or to
gloss over the facts that are subversive of their fetishes. When they
write books in honour of their fetishes, they omit many facts which tend
to show that their fetishes are shams. They regard the discussers of the
awkward facts as enemies to be crushed. Hence the gulf between the two
classes of biologists.
One of the fetishes of the present day is the theory of protective
mimicry. Butterflies and moths are the organisms which exemplify best
this theory.
It often happens that two species of butterfly occur in the same
locality which resemble one another in outward appearance. In such cases
zoologists assert that one species mimics the other. They maintain that
this mimicry has been brought about by natural selection, because the
one species profits by aping its neighbour. The species that is copied
is said to be unpalatable. The copy-cat, if I may use the expression,
may be either palatable or unpalatable. In either case it is believed to
profit by the resemblance. If it is edible the birds that are supposed
to prey upon butterflies are said to leave it alone, because they
mistake it for its unpalatable neighbour. This resemblance of an edible
form to an unpalatable one is called Batesian mimicry.
If the copy-cat be unpalatable it is nevertheless said to profit by the
likeness, because young birds are supposed to feed on every kind of
butterfly and only to learn by experience which are unpalatable. The
theory is that if they attack a red-coloured butterfly and find it nasty
to the taste, they leave all red-coloured butterflies alone henceforth.
Thus, the imitating species may benefit by the sacrifice of the other
red-coloured species. This is known as Mullerian mimicry.
The mimicry theory is very enticing; indeed, it is so enticing that
those who hold it, as, for example, Professor Poulton, of Oxford, seem
to think that there _must_ be something wrong with the evidence opposed
to it.
I assert that it is not the evidence against the theory, but the theory
itself that is wrong.
The objections to the hypothesis are many and weighty. Finn and I
summarised most of them in _The Making of Species_.
Two of the objections appear to be insuperable.
The likeness cannot be of much use until it is fairly strong. How, then,
is the beginning of the resemblance to be explained?
In order that natural selection should have produced these astounding
resemblances, it is necessary that butterflies should be preyed on very
largely by birds; but all the evidence goes to show that birds very
rarely eat butterflies. In the course of some ten years spent in India I
have not seen butterflies chased by birds on more than a dozen
occasions. Similarly, Colonel Yerbury, during six years’ observation in
India and Ceylon, can record only about six cases of birds capturing, or
attempting to capture, butterflies. Colonel C. T. Bingham, in Burma,
states that between 1878 and 1891 he on two occasions witnessed the
systematic hawking of butterflies by birds, although he observed on
other occasions some isolated cases.
Nor is the evidence, as regards India, confined to the experience of the
casual observer. Mr. C. W. Mason, when supernumerary entomologist to the
Imperial Department of Agriculture for India, conducted a careful
enquiry into the food of birds. The enquiry was made at Pusa in Bengal,
in the years 1907, 1908, 1909. The results arrived at by Mr. Mason are
published in the _Memoirs of the Department of Agriculture for India_
(Entomological Series, Vol. III, January, 1912). As the result of this
enquiry, in the course of which the contents of the stomachs of hundreds
of Indian birds were examined, Mr. Mason writes (page 338, _loc. cit._):
“Butterflies do not form any appreciable proportion of the food of any
one species of bird, though a good many birds take these insects at
times. . . .
“The butterflies include a number of minor pests, of which _Melanitis
ismene_ was taken by _Merops viridis_ and _Papilio pammon_ by
_Acridotheres tristis_. Other well-known pests are _Pieris brassicae_,
_Virachola isocrates_ and _Papilio demoleus_. _Belenois mesentina_, a
Pierid, was seen to be taken on one occasion by the king-crow, and
_Ilerda sena_ by _Passer domesticus_, both of which insects are neutral.
“Moths include many major pests of varied habits—defoliators, miners,
cut-worms, grain and fabric pests. The larvae form an inexhaustible
supply of insect food to almost all species of insectivorous birds, and
even many species of birds that when mature feed almost, if not quite,
entirely on grain and seeds are when in the nest fed very largely on
caterpillars by the parent birds.”
Obviously, then, in India birds comparatively rarely attack butterflies;
but they devour millions of caterpillars. It is the same in other parts
of the world.
Mr. G. A. K. Marshall, in the course of five years’ observation in South
Africa, recorded eight cases of birds capturing butterflies.
Similarly Mr. Banta points out in various issues of _Nature_, in 1912,
that all the evidence available shows that in North America birds very
rarely capture butterflies. Field naturalists scarcely ever witness a
butterfly chased by a bird. Of 40,000 stomachs of birds examined very
few were found to contain remains of butterflies.
In 1911 the butterflies of the species _Eugonia californica_ were so
numerous that “the ground was often blackened with them, and great
swarms of them filled the air from morning to evening.” Yet of the birds
in the locality where those butterflies were most numerous, only five
out of forty-five species were found by direct observation and stomach
examination to eat the eugonia, and the only bird that fed off them
copiously was the brewer blackbird (_Euphagus cyanocephalus_) which is
almost omnivorous, and eats insects of all kinds, even if they be what
Darwinians call warningly coloured!
Now, modern theorists, as a rule, ignore facts such as these, and this
certainly is the wisest course they can pursue, unless they are ready to
give up these theories or make themselves look foolish.
However, I am glad to be able to record that Professor Poulton has, as
regards the remarks of Mr. Banta, not followed the usual course of the
modern theorist.
He has had the courage to take up the cudgels and reply to Mr. Banta in
_Nature_. The reason of this unusual course appears to be that Mr. C. F.
M. Swynnerton has made some observations in South Africa which Professor
Poulton considers are in favour of his pet theory.
According to the Professor, Mr. Swynnerton, as the result of three and a
half years’ investigation in South-East Rhodesia, “has obtained the
records of nearly 800 attacks made by 35 species of birds belonging to
30 genera and 18 families, upon 79 species of butterflies belonging to 9
families or sub-families.”
Professor Poulton does not seem to see that the researches of Mr.
Swynnerton are altogether subversive of the theory of protective
mimicry. In order that natural selection may totally change the
colouring of a butterfly (as it does according to the theory of
protective mimicry), that butterfly must be habitually preyed upon by
large numbers of birds, which must be so vigilantly and unceasingly on
the look-out for it, that its only chance of escaping from their attacks
must be for it to assume a disguise.
Compare with this the state of affairs revealed by Mr. Swynnerton’s
observations. He worked for three and a half years, and, as his
investigations extended to eighteen families of birds, they must have
been very extensive. Exactly how extensive they have been we do not
know, because he has not yet published them. Nevertheless, as the result
of three and a half years’ watching and stomach examination he has
evidence of only “nearly 800” attacks made by birds on insects; that is
to say, on an average about two attacks in three days!
Watch a bee-eater feeding and you will see it take twenty or thirty
insects in less than an hour. If you were to watch it one whole day you
might see it capture 300 insects, but certainly not more than one of its
victims, on an average, would be a butterfly. Yet, the theory of mimicry
is based upon the assumption that butterflies are so greatly preyed upon
by birds that they require special means of protection!
I ask all who are interested in the subject to be ever on the look-out
for birds chasing butterflies or moths. These are so large and so easy
to identify that there can be no chance of mistaking them. Even a casual
observer, when watching a bird, cannot fail to notice the capture of a
butterfly by it. And when a bird has captured a butterfly it cannot
dispose of it very quickly. According to Mr. Swynnerton, “some (birds)
swallow the insect (butterfly or moth) whole, but usually after
masticating or beating it; some remove inconvenient portions by
‘worrying’ like a dog or beating against perch or ground; some grasp the
prey in one foot and tear off the rejected portions with the bill,
eating the rest piecemeal.”
The fact that the average bird has to go through all the above
performances before devouring a creature containing so little
nourishment as a butterfly, is sufficient to show that it does not pay
birds to chase butterflies.
But it is best not to rely on arguments to refute the theories of
persons who have no logic in them. The only way to destroy the
pernicious zoological theories that hold the field at present is to pile
up the facts that tell against them. Similarly, theories that are true
cannot be established satisfactorily except by the accumulation of
facts. The relations between birds and butterflies can be determined
only by observation, and for that kind of observation no country
presents a better field than India. Moreover, such observations can be
conducted by people having little or no scientific knowledge.
XXXIX
VOICES OF THE NIGHT
The stillness of the Indian night suffers many interruptions.
In the vicinity of a town or village the hours of darkness are rendered
hideous by the noises of human beings and of their appendages—the pariah
dogs. In the jungle the “friendly silences of the moon” are continually
disturbed by the bark of the fox, the yelling of the jackal, or the
notes of the numerous birds of the night.
The call of the various nocturnal birds must be familiar to every person
who has spent a hot weather in the plains of Northern India and slept
night after night beneath the starry heavens. With the calls of the
birds all are familiar, but some do not know the names of the
originators of these sounds.
First and foremost of the fowls that lift up their voices after the
shades of night have fallen are the tiny spotted owlets (_Athene
brama_). Long before the sun has set these quaint little creatures
emerge from the holes in which they have spent the day, and treat the
neighbours to a “torrent of squeak and chatter and gibberish” which is
like nothing else in the world, and which Tickell has attempted to
syllabise as “_Kucha, kwachee, kwachee, kwachee, kwachee_,” uttered as
rapidly as the little owlets’ breath will allow of. These noisy
punchinellos are most vociferous during moonlit nights, but they are by
no means silent in the dark portion of the month.
Almost as abundant as the spotted owlet is another feathered pigmy—the
jungle owlet (_Glaucidium radiatum_). This species, like the last, calls
with splendid vigour. Fortunately for the Anglo-Indian its note is
comparatively mellow and musical. It is not altogether unlike the noise
made by a motor cycle when it is being started, consisting, as it does,
of a series of disyllables, low at first with a pause after each, but
gradually growing in intensity and succeeding one another more rapidly
until the bird seems to have fairly got away, when it pulls up with
dramatic abruptness. The best attempt to reduce to writing the call of
this bird is that of Tickell: “_Turtuck, turtuck, turtuck, turtuck,
turtuck, turtuck, tukatu, chatuckatuckatuck._” This owlet calls in the
early part of the night and at intervals throughout the period of
darkness, and becomes most vociferous just before the approach of
“rosy-fingered dawn.”
Very different is the cry of the little scops owl (_Scops giu_). This
bird has none of that Gladstonian flow of eloquence which characterises
the spotted and the jungle owlets. His note is, however, more befitting
the dignity of an owl. He speaks only in monosyllables, and gives vent
to those with great deliberation. He sits on a bough and says “_wow_” in
a soft but decisive manner. When this pronouncement has had time to sink
into the ears of his listeners, he repeats “_wow_,” and continues to
sound this impressive monotone at intervals of a minute for several
hours.
The above are the three owls which are most often heard in the plains of
Northern India. Sometimes all three species, like the orators in Hyde
Park, address the world simultaneously from neighbouring trees.
There are numbers of other owls that disturb the stillness of the night
with more or less vigour, but it would be tedious, if not impossible, to
describe them all. It must suffice to make mention of the low, solemn
booming _durgoon durgoon_, of the huge rock-horned owl (_Bubo
bengalensis_) and the wheezy screech of the barn owl (_Strix flammea_).
Another call, often heard shortly before dawn, is doubtless usually
believed to be that of an owl. This is the deep, _whoot, whoot, whoot_
of the coucal or crow pheasant (_Centropus sinensis_), that curious
chocolate-winged black ground-cuckoo which builds its nest in a dense
thicket.
Unfortunately for the peace of mankind the coucal is not the only cuckoo
that lifts up its voice in the night. Three species of cuckoo exist in
India which are nocturnal as owls, as diurnal as crows, and as noisy as
a German band. A couple of hours’ sleep in the hottest part of the day
appears to be ample for the needs of these super-birds. From this short
slumber they awake, like giants refreshed, to spend the greater portion
of the remaining two-and-twenty hours in shrieking at the top of their
voices.
Needless to state these three species are the brain-fever bird, the
koel, and the Indian cuckoo—a triumvirate that it is impossible to match
anywhere else in the world. Some there are who fail to distinguish
between these three giants, and who believe that they are but one bird
with an infinite variety of notes. This is not so. They are not one
bird, but three birds. Let us take them in order of merit.
The brain-fever bird or hawk cuckoo (_Hierococcyx varius_) is _facile
princeps_. In appearance it is very like a sparrow-hawk, and, but for
its voice, it might be mistaken for one. This species has two distinct
notes. The first of these is well described by Cunningham as a “highly
pitched, trisyllabic cry, repeated many times in ascending semitones
until one begins to think, as one sometimes does when a Buddhist is
repeating his ordinary formula of prayer, that the performer must surely
burst.” But the brain-fever bird never does burst. He seems to know to a
scruple how much he may with safety take out of himself. It is not
necessary to dilate upon this note. Have we not all listened to the
continued screams of “brain-fever, _brain-fever_, Brain-fever,” until we
began to fear for our reason? The other call is in no way inferior in
magnitude. It consists of a volley of single descending notes, uttered
with consummate ease—_facilis descensus_—which may or may not, at the
option of the performer, be followed by one or more mighty shouts of
Brain-fever. There is not an hour in the twenty-four during the hot
weather when this fiend does not make himself heard in the parts of the
country haunted by him. His range extends from Naini Tal to Tuticorin
and from Calcutta to Delhi. Assam, Sind, and the Punjab appear to be the
only portions of India free from this cuckoo.
The second of the great triumvirate is the Indian koel (_Eudynamis
honorata_). This noble fowl has three calls, each as powerful as the
others.
The first is a crescendo _ku-il, ku-il, ku-il_, very pleasing to Indian
ears, but too powerful for the taste of Westerns. The second is well
described by Cunningham as an outrageous torrent of shouts, sounding
“_kuk, kŭū, kŭū, kŭū, kŭū, kŭū_,” repeated at brief intervals in tones
loud enough to wake the seven sleepers. When the bird thus calls its
whole body vibrates with the effort put forth. The third cry is uttered
only when the koel is being chased by angry crows, and is, as Cunningham
says, a mere cataract of shrill shrieks: “_Hekaree, karee_.”
For the benefit of those unacquainted with the ways of the koel it is
necessary to state that that bird spends much of its time fleeing before
the wrath of crows. It lays its eggs in the nests of these. And, if one
may judge from their behaviour, they suspect the koel. The other two
calls are heard at all hours of the day and night, and it makes no
difference to the koel whether it is the sun or the moon, or only the
stars that are shining. He is always merry and bright. The second call,
however, is usually reserved for the dawn. Hence this particular vocal
effort is rendered all the more exasperating, coming as it does
precisely at the time when, after the departure of a “sable-vested
night” straight from Dante’s Inferno, which has been embellished by the
sluggishness of the _punkawalla_, a certain degree of coolness sets in
to give some chance of a little refreshing sleep. Then is it that the
jaded dweller in the plains, uttering strange oaths, rushes for his gun
and seeks out the disturber of his slumber. In case there be any unable
to identify the koel, let it be said that the cock is black from head to
foot, that he possesses a wicked-looking red eye, that he is about the
size of a crow, but has a slighter body and a longer tail. The hen is
speckled black and white. This bird spares not even Sind or the Punjab.
It visits every part of the plains of India, wintering in the south and
summering in the north.
The third of the triumvirate, the common Indian cuckoo (_Cuculus
micropterus_), although in its way a very fine bird, is not of the same
calibre as its confrères. It stands to them in much the same relation as
Trinity College, Dublin, does to the Universities of Oxford and
Cambridge. It has quite a pleasant note, which Indians represent as
_Boutotaka_, but which is perhaps better rendered by the words
“wherefore, therefore,” repeated with musical cadence. It does not call
much during the middle of the day. It usually uplifts its voice about
two hours before sunset, and continues until the sun has been up for a
couple of hours. This cuckoo is very common in the Himalayas and in the
plains of India from Fyzabad to Calcutta. Fyzabad ought really to be
renamed Cuckooabad. It is the habitation of untold numbers of cuckoos.
There during the merry month of May the cuckoos spend the night chanting
anthems of which the refrain runs _kui-il, ku-il, ku-il, wherefore,
therefore, brain-fever, brain-fever, brain-fever_. The Indian cuckoo is
very like the English cuckoo in appearance, and it victimises the seven
sisters (_Crateropus canorus_) and other babblers, as does the
brain-fever bird.
The night-loving cuckoos have demanded so much space that the other
vocalists of the hours of darkness will have to be content with very
brief notice.
The night heron (_Nycticoran griseus_) makes the welkin ring with his
guttural cries of “_waak, waak_,” uttered as he flies after nightfall
from his roost to the pond where he will fish till morning. As he fishes
in silence the addition he makes to the noises of the night is not
great. The large family of plovers must be dismissed in a single
sentence. They, like many cuckoos, regard sleep as a luxury; hence their
plaintive cries are heard both by day and by night. The most familiar of
their calls is the “_did-he-do-it, pity-to-do-it_,” of the red-wattled
lapwing (_Sarcogrammus indicus_). The notes of the rest of his family
consist of variations of the words _titeri, titeri_.
In conclusion, mention must be made of the nightjars or goatsuckers, as
they are sometimes called after the fashion of the Romans, who believed
that these birds used to sally forth at night and milk goats. This
belief was based on two facts. First, the udders of goats were often
found to be empty in the morning; secondly, the broad gape possessed by
the nightjar. However, the character of these birds has now been
cleared. We know that their bills are wide in order to seize large
insects on the wing, and that if goats yield no milk in the morning it
is not the nightjar who is to blame. Nightjars are brownish grey birds,
mottled and barred all over like cuckoos, for which they are often
mistaken. Two are common in India. The first of these is _Caprimulgus
asiaticus_, the common Indian nightjar, whose call is heard only after
nightfall, and resembles the sound made by a stone skimming over ice.
The other nightjar is that of Horsfield (_Caprimulgus macrurus_). Its
note has been compared to the noise made by striking a plank with a
hammer. The distribution of nightjars is capricious. They are fairly
common in the western districts of the United Provinces.
Horsfield’s nightjar is abundant in the _sal_ forests of the Pilibhit
district.