BUTCHER BIRDS

Butcher birds are so called because they are reputed to have a habit of

impaling on thorns their larger victims, or as much of them as they,

owing to want of accommodation, are incapable of eating at the time of

the murder. A bush which displays a number of impaled victims—young

birds, lizards, locusts, and the like—is supposed, by a stretch of the

ornithological imagination, to look like a butcher’s shop. All that is

wanted to perfect the illusion is a sign-board, bearing the legend

“Lanius vittatus, Purveyor of Meat.” I must here admit, with

characteristic honesty, that I have never set eyes upon such a butcher’s

shop, or larder, as it should be called, for the shrike does not sell his

wares—he merely stores them for personal consumption. Nor have I even

seen a shrike impale a victim. My failure cannot, I think, be attributed

to lack of observation; for I never espy one of these miniature birds of

prey without watching it attentively, in the hope that it will oblige me

by acting as all books on ornithology tell me shrikes do. Every butcher

bird I have witnessed engaged in _shikar_ has pounced down upon its

insect quarry from a suitable perch, seized the luckless victim upon the

ground, immediately carried it back to its perch and devoured it then and

there. I have seen this operation repeated scores of times. I, therefore,

think I am justified in suggesting that the habit of keeping a larder is

probably restricted to the larger species of shrike, and that these only

impale their victim when there is still something of it left over, after

they have eaten so much that for the time being they cannot possibly stow

away any more. Jerdon, I notice, makes no mention of ever having seen a

butcher bird behave in the orthodox manner. Colonel Cunningham, who is a

very close observer of bird life, says, as the result of a long sojourn

in India, that shrikes “do not seem very often to impale their victims,

probably because these are usually easily broken up; but when they have

secured a lizard they sometimes fix it down upon a stout thorn so as to

have a point of resistance whilst working at the hard, tough skin.” If

any who read these lines have seen a shrike’s larder, either in India or

in England, I should esteem it a great favour if they would furnish me

with some account of it.

Let me not be mistaken. I do not say that butcher birds never keep

larders, for they undoubtedly do; of this I am satisfied. Thus Mr. E. H.

Aitken says of the shrike: “It sits upright on the top of a bush or low

tree, commanding a good expanse of open, grassy land, and watches for

anything which it may be able to surprise and murder—a large grasshopper,

a small lizard, or a creeping field mouse. Sometimes it sees a possible

chance in a flock of small birds absorbed in searching for grass seeds.

Then it slips from its watch-tower and, gliding softly down, pops into

the midst of them without warning, and forgetting all about the true

nature of its deep plantar tendons, strikes its talons into the nearest.

No other bird I know of makes its attack in this way except the birds of

prey. The little bird shrieks and struggles, but the cruel shrike holds

fast and hammers at the victim’s head with its strong beak until it is

dead, then flies away with it to some thorn bush which is its larder.

There it hangs it up on a thorn and leaves it to get tender. . . . This

is no fable, I have seen the bird do it.” Again, the Rev. C. D. Cullen,

with whom I have enjoyed many an ornithological ramble in England and on

the continent of Europe, informs me that once in Surrey he came upon a

shrike’s larder, and on that occasion the “shop” consisted of the legs of

a young green finch.

The usual food, then, of the butcher bird appears to be small insects.

When a suitable opportunity offers, the larger species will attack a

lizard or a young or sickly bird, especially a bird in a cage. Of the

rufous-backed shrike Mr. Benjamin Aitken writes: “It will come down at

once to a cage of small birds exposed at a window, and I once had an

amadavat killed and partly eaten through the wires by one of these

shrikes, which I saw in the act with my own eyes. The next day I caught

the shrike in a large basket which I set over the cage of amadavats.”

But, of course, it is one thing to catch a bird in a cage and another to

capture it in the open. Shrikes are savage enough for any murder, but

most little birds are too sharp for them.

Fifteen species of shrike occur in India. The commonest are, perhaps, the

Indian grey shrike (_Lanius lahtora_) and the bay-backed shrike (_Lanius

vittatus_). The latter is the one that frequents our gardens. He is not a

large bird, being about the size of a bulbul. The head and back of the

neck are a pretty grey. The back is chestnut-maroon, shading off to

whitish near the tail. There is a broad black streak running across the

forehead and through the eye, giving the bird a grim, sinister aspect.

The breast and lower parts are white; the wings and tail black, or rather

appear black when the bird is at rest. During flight the pinions display

a conspicuous white bar, and the white outer tail feathers also come into

view. The stout beak is black, and the upper mandible projects downwards

over the lower one. This further adds to the ferocity of the bird’s mien.

It is impossible to mistake a butcher bird; look out for its grey head,

broad, black eyebrow, and white breast.

The usual note of the shrike is a harsh cry, but during the breeding

season, that is to say, from March to July, the cock is able to produce

quite a musical song.

At all times the butcher bird is a great mimic. I am indebted to a

correspondent for the following graphic account of his histrionic

performances: “Of late one of these birds has daily perched himself on a

_neem_ tree in my compound and treated me to much music. His hours of

practice are early in the morning and at sunset. He begins with his

natural harsh notes, and then launches out into mimicry. I gave him a

patient hearing this morning, and he treated me to the following: the

lap-wing, the sparrow-hawk, the partridge, the Brahminy minah, the kite,

the honeysucker, the hornbill (of these parts), the scream of the green

parrot, and the cry of a chicken when being carried off by a kite.”

The nests of the various species of shrike resemble one another very

closely. Speaking generally, the nest is a neatly made, thick-walled,

somewhat deep cup. All manner of material is pressed into service—grass,

roots, wool, hair, leaves, feathers, pieces of rag, paper, fine twigs,

and straw. The whole forms a compact structure firmly held together by

cobweb, which is the cement ordinarily utilised by bird masons.

The nursery is usually situated in a small tree, a thorny one for

preference, in the fork of a branch, or the angle that a branch makes

with the main stem. Seen from below it looks likes a little mass of

rubbish. As a rule one or two pieces of rag hang down from it and betray

its presence to the egg-collector.

The normal clutch of eggs is four. The ground colour of these is cream,

pale greenish, or grey, and there is towards the large end a zone of

brown or purplish blotches.

The shrike is not a shy bird. I have sat within eight feet of a nest and

watched the parents feeding their young. No notice was taken of me, but a

large lizard that appeared on the branch on which the nest was placed was

savagely attacked. The young seem to be fed chiefly on large green

caterpillars.

Newly fledged butcher birds differ considerably from the adults, and

while in the transition stage are sometimes rather puzzling to the

ornithologist.

Birds of the Plains · 第 35 / 60 题