161. SHAG. _Phalacrocorax graculus_, Linnaeus. French, "Cormoran

largup."--The Shag almost entirely takes the place, as well as usurps

the name, of its big brother, as in the Islands it is invariably called

the Cormorant. The local Guernsey-French name "Cormoran" is applicable

probably to either the Shag or the Cormorant. The Shag is the most

numerous of the sea birds which frequent the Islands, the Herring Gull

not even excepted, every nook and corner of the high cliffs in all the

Islands being occupied by scores of Shags during the breeding-season.

They take care, however, to place their nests in tolerably inaccessible

places that cannot well be reached without a rope. The principal

breeding-places are--in Guernsey, about the Gull Cliffs, and from there

to Petit Bo, and a few, but not so many, on the rocks between there and

Fermain, wherever they can find a place; none breed on the north or west

side of the Island; in Jethou and Herm, and on the rock called La

Fauconnière, a few also breed, but not so many as in Guernsey, and we

did not find any breeding on the Amfrocques or the other rocks to the

north of Herm. On Sark they breed in great numbers, mostly on the west

side nearest to Guernsey, and on the Isle de Marchant or Brechou,

especially on the grand cliffs on both sides the narrow passage which

divides that Island from the mainland of Sark, and from there to the

Coupée, and from there round Little Sark to the Creux Harbour on the

south-east. On the east side, that towards the French coast, there are

few or none breeding, the cliffs not being so well suited to them; a

great number breed also on Alderney, on the high cliffs on the south and

east, but none on Burhou. The Shags appear to breed rather earlier than

the Herring Gulls; when I was in the Islands in June, 1876, almost all

the Shags had hatched, and the young were standing by their parents on

the rocks close to their nests. When I visited some of the

breeding-places of the Shags on the 27th of May, 1878, neither Gulls nor

Shags had hatched, but when I went to the Gull Cliff on the 20th of June

I found nearly all the Shags had hatched, though none or very few of the

Herring Gulls had done so; some of the young Shags had left the nests

and were about on the water; others were nearly ready to leave, and

several were little things quite in the down. Though it is generally

easy to look down upon the Shags on their nests, and to get a good view

at a short distance of the eggs and the young, it is, as a rule, by no

means easy to get at them without a rope; in a few places, however,

their nests are more accessible, and a hard climb on the rocks, perhaps

with a burning sun making them almost too hot to hold, will bring you

within reach of a Shag's nest; but I would not advise any one who tries

it to put on his "go-to-meeting clothes," as the deposit of guano on the

rocks will spoil anything; and only let him smell his hands after his

exploit--they do smell so nice! One of the parents generally stands by

the young after they are hatched, I suppose to prevent them from

wandering about and falling off the rocks, as the positions of some of

them seem very critical, there being only just room for the family to

stand; the other parent is generally away fishing, only returning at

intervals to feed his family and dry his feathers before making a fresh

start; sometimes one parent takes a turn to stay by the young, and

sometimes the other. The usual number of young appeared to be three,

sometimes only one or two; but in these cases it is probable that a

young one or two may have waddled off the rock, or got into a crevice

from which the parents could not extricate it, accidents which I should

think frequently happen; or an egg or two may have been blown from the

nest, or egg or young fallen a victim to some marauding Herring Gull

during the absence of the parents. The Shag assumes its full

breeding-plumage and crest very early; I have one in perfect

breeding-plumage, killed in February; and Miss C.B. Carey mentions in

the 'Zoologist' having seen one in Mr. Couch's shop with its full crest

in January. I do not quite know at what time the young bird assumes

adult plumage, but I have one just changing from the brown plumage of

the young to adult plumage. Many of the green feathers of the adult are

making their appearance amongst the brown ones; this one I shot on the

26th June, 1866, near the harbour Goslin, at Sark, near a large

breeding-station of Shags and Herring Gulls: if it is, as I suppose, a

young bird of the year, it would show a very early change to adult

plumage, but of course it might have been a young bird of the previous

year; but, as a rule, young birds of the previous year are not allowed

about the breeding-stations, any more than they are by the Herring

Gulls.

The Shag is included in Professor Ansted's list, but curiously enough

only marked as occurring in Guernsey. There are two adult specimens and

one young bird and one young in down in the Museum.

162. GANNET. _Sula bassana_, Linnaeus. French, "Fou de bassan."--The

Gannet, or Solan Goose, as it is sometimes called, is a regular autumn

and winter visitant to all the Islands, but never so numerous, I think,

as on the south coast of Devon; birds, however, in all states of

plumage, young birds as well as adults, and in the various intermediate

or spotted states of plumage, make their appearance. It stays on through

the winter, but never remains to breed as it does regularly at Lundy

Island. I have seen both adults and young birds fishing round Guernsey,

and Mrs. Jago (late Miss Cumber) told me she had had several through her

hands when she was the bird-stuffer there; she also wrote to me on the

16th March, 1879, to say a fully adult Gannet had been shot in Fermain

Bay on the 15th; and Mr. Grieve, the carpenter and bird-stuffer at

Alderney, had the legs and wings of an adult bird, shot by him near that

Island, nailed up behind the door of his shop. I do not think, however,

that the strong tides, rough seas, and sunken rocks of the Channel

Islands suit the fishing operations of the Gannet as well as the

smoother seas of the south coast of Devon; not but what the Gannet can

stand any amount of rough sea; and I have seen it dash after fish into

seas that one would have thought must have rolled it over and drowned

it, especially as it rose to the surface gulping down its prey.

It is included in Professor Ansted's list, but only marked as occurring

in Guernsey. There are three specimens, an adult and two young, in the

Museum.

163. COMMON TERN. _Sterna fluviatilis_, Naumann. French, "Hirondelle de

mer," "Pierre garin." The Common Tern is a regular but not numerous

spring and autumn visitant to the Islands, some remaining to breed. I do

not know that it breeds anywhere in Guernsey itself, but it may do so,

for in the Vale in the summer of 1878 I saw more than one pair about the

two bays, Grand Havre and L'Ancresse, all through the summer; some of

them certainly seemed paired, but I never could find where their nests

were; some of the others apparently were non-breeding birds, as they did

not appear to be paired. These bays and along the coast near St. Samson

were the only places in Guernsey itself that I saw the Terns; there were

some also about Herm, but we could not find any nests there; but Mr.

Howard Saunders and myself found a few pairs breeding on one of the

rocky islands to the north of Herm; when we visited them on the 27th

June, 1878, we only found four nests, two with two eggs each and two

with only one egg each. Probably these were a second laying, the nests

having been robbed, as had everything else on these Islands; there must

have been more than four nests there really, as there were several

pairs of birds about, but we could not find any other nests; these four

were on the hard rocks, with little or no attempt at a real nest. This

was the only one of the small rocky islands on which we found Terns

breeding, though we searched every one of them that had any land above

water at high tide; the others, of course, were useless. I had expected

for some time that Common Terns did breed on some of these rocks, as I

have an adult female in full breeding-plumage, which had been shot on

the 29th June, 1877, near St. Samson's, which is only about three miles

from these Islands, and which certainly showed signs of having been

sitting; and Mr. Jago, the bird-stuffer, had one in full

breeding-plumage, killed at Herm early in June, 1878; but several of the

sailors about, and some friends of mine who were in the habit of

visiting these islands occasionally, seemed very sceptical on the

subject; but Mr. Howard Saunders and I quite settled the question by

finding the eggs, and we also thoroughly identified the birds. The

Common Tern seemed to be the only species of Tern breeding on the rocks;

we certainly saw nothing else, and no Common Terns even, except on the

one island on which we found the eggs. The autumnal visitants are mostly

young birds of the year, some of them, of course, having been bred on

the Islands and others merely wanderers from more distant

breeding-stations. No young Terns appeared to have flown when I left

the Islands at the end of July; at least, I saw none about, though there

were several adults about both Grand Havre and L'Ancresse Bay. The same

remark applies to Herm, where my last visit to the shell-beach was on

the 22nd of July, when I saw several adult Common Terns about, but no

young ones with them; all these were probably birds which had been

robbed of one or more clutches of eggs.

Professor Ansted includes the Common Tern in his list, but only marks it

as occurring in Guernsey. There is one specimen in the Museum, a young

bird of the year.

164. ARCTIC TERN. _Sterna macrura_, Naumann. French, "Hirondelle de mer

arctique."[31]--The Arctic Tern is by no means so common in the Islands

as the Common Tern, and is, as far as I can make out, only an occasional

autumnal visitant, and then young birds of the year most frequently

occur, as I have never seen a Guernsey specimen of an adult bird. I do

not think it ever visits the Islands during the spring migration; I did

not see one about the Vale in the summer of 1878, nor did Mr. Howard

Saunders and myself recognise one when we visited the rocks to the north

of Herm. It may, however, have occurred more frequently than is

supposed, and been mistaken for the Common Tern, so it may be as well

to point out the chief distinctions: these are the short tarsus of the

Arctic Tern, which only measures 0.55 of an inch, whilst that of the

Common Tern measures 0.7 of an inch; and the dark grey next to the shaft

on the inner web of the primary quills of the Arctic Tern, which is much

narrower than in those of the Common Tern. These two distinctions hold

good at all ages and in all states of plumage; as to fully adult birds

in breeding plumage there are other distinctions, the tail of the Arctic

Tern being much longer in proportion to the wing than in the Common

Tern, and the bill being nearly all red instead of tipped with

horn-colour.

The Arctic Tern is not included in Professor Ansted's list, and there is

no specimen at present in the Museum.

165. BLACK TERN. _Hydrochelidon nigra_, Linnaeus. French, "Guifette

noire," "Hirondelle de mer épouvantail."[32]--The Black Tern is by no

means a common visitant to the Islands, and only makes its appearance in

the autumn, and then the generality of those that occur are young birds

of the year. I have one specimen of a young bird killed at the Vrangue

on the 1st October, 1876. It does not seem to occur at all on the spring

migration; at least I have never heard of or seen a Channel Island

specimen killed at that time of year. As this is a marsh-breeding Tern,

it is not at all to be wondered at that it does not, at all events at

present, remain to breed in the Islands, there being so few places

suited to it, though it is possible that before the Braye du Valle was

drained, and large salt marshes were in existence in that part of the

Island, the Black Tern may have bred there. I can, however, find no

direct evidence of its having done so, and therefore can look upon it as

nothing but an occasional autumnal straggler.

The Black Tern is not included in Professor Ansted's list, and there is

no specimen in the Museum. These are all the Terns I have been able to

prove as having occurred in the Channel Islands, though it seems to me

highly probable that others occur--as the Sandwich Tern, the Lesser

Tern, and the Roseate Tern (especially if, as I have heard stated, it

breeds in small numbers off the coast of Brittany). Professor Ansted

includes the Lesser Tern in his list, but that may have been a mistake,

as my skin of a young Black Tern was sent to me for a Lesser Tern.

166. KITTIWAKE. _Rissa tridactyla_, Linnaeus. French, "Mouette

tridactyle."--The Kittiwake is a regular and numerous autumn and winter

visitant to all the Islands, sometimes remaining till late in the

spring, which misled me when I made the statement in the 'Zoologist'

for 1866 that it did breed in the Channel Islands; subsequent

experience, however, has convinced me that the Kittiwake does not breed

in any of the Islands. Captain Hubback, however, informed me that a few

were breeding on the rocks to the south of Alderney in 1878, but when

Mr. Howard Saunders and I went with him to the spot on the 25th June, we

found no Kittiwakes there, all those Captain Hubback had previously seen

having probably departed to their breeding-stations before our visit,

and after they had been seen by him some time in May. Professor Ansted

includes the Kittiwake in his list, but only marks it as occurring in

Guernsey and Sark. There are two specimens in the Museum, an adult bird

and a young one in that state of plumage in which it is the Tarrock of

Bewick and some of the older authors.

167. HERRING GULL. _Larus argentatus_, Gmelin. French, "Goeland

argenté," "Goeland à manteau bleu."--The Herring Gull is very common,

indeed the commonest Gull, and is resident in all the Islands throughout

the year, breeding in nearly all of them in such places as are suited to

it. In Guernsey it breeds on the high cliffs, from the so-called Gull

Cliff, near Pleinmont, to the Corbiere, the Gouffre, the Moye Point to

Petit Bo in considerable numbers; from Petit Bo Bay to St. Martin's

Point much more sparingly. In Sark it breeds in considerable numbers; on

Little Sark on both sides of the Coupée, and on nearly all the west

side; that towards Guernsey, especially about Harbour Goslin, a place

called the Moye de Moutton near there, which is a most excellent place

for watching the breeding operations of this Gull as well as of the

Shags, as with a moderate climb on the rocks one can easily look into

several nests and see what both old and young are about. On the island

close to Sark, called Isle de Merchant, or Brechou, especially on the

steep rocky side nearest to Sark; a great many also breed on and about

the Autelets: in fact, almost all the grandest and wildest scenery in

Sark has been appropriated by the Herring Gulls for their

breeding-places, who, except for the Shags, hold almost undisputed

possession of the grandest part of the Island. On the east side, or that

towards France, few or no Herring Gulls breed; the cliffs being more

sloping, and covered with grass and gorse, and heather, are not at all

suited for breeding purposes for the Herring Gull. A few pairs have

lately set up a small breeding-station on the rock before mentioned near

Jethou, as La Fauconnière; a very few also breed on Herm on the south

part nearest to Jethou, but none that we could see on the rocks to the

north of Herm. A great many breed also in Alderney on the south and east

sides, but none on the little island of Burhou, which has been entirely

appropriated by the Lesser Black-backs; in all these places the Herring

Gulls and Shags take almost entire possession of the rocks, the Lesser

Black-backs apparently never mixing with them; indeed, except a chance

straggler or two passing by, a Lesser Black-back is scarcely to be seen

at any of these stations. The Herring Gull and the Lesser Black-back,

though very distinct in their adult plumage, and even before they fully

arrive at maturity, as soon as they begin to show the different colour

of the mantle, which they do in their second autumn, when a few of

either the dark or the pale grey feathers appear amongst the brownish

ones of the young bird, are before this change begins very much alike.

In the down I think they are almost, if not quite, indistinguishable

after that in their first feathers, and up to their first winter they

appear to me distinguishable. As far as the primary quills go I do not

see much difference; the shafts, perhaps, of the quills of the Lesser

Black-back are darker than those of the Herring, but the difference if

anything is very slight; but the head and neck and the centres of the

feathers of the back of the Lesser Black-back are darker,--more of a

dark smoky brown than those of the Herring Gull: this difference of

colour is even more apparent on the under surface, including the breast,

belly, and flanks. The shoulder of the wing and the under wing-coverts

of the Lesser Black-back are much darker, nearly dull sooty black, and

much less margined and marked with pale whitey brown than those of the

Herring Gull. The dark bands on the end of the tail-feathers of the

Lesser Black-back are broader and darker than in the Herring Gull: this

seems especially apparent on the two outer tail-feathers on each side;

besides this, there is a slight difference in the colour of the legs,

those of the Lesser Black-back showing a slight indication of the yellow

of maturity. I have noted these distinctions both from living specimens

of both species which I have kept, and noted their various changes from

time to time, and from skins of both: unfortunately the two skins of the

youngest birds I have are not quite of the same age, one being that of a

young Herring Gull, killed at the Needles in August,--the other a young

Lesser Black-back, killed in Guernsey in December; but I do not think

that this difference of time from August to December, the birds being of

the same year, makes much difference in the colour of the feathers; at

least this is my experience of live birds: it is not till the next moult

that more material distinctions begin to appear; after that there can be

no doubt as to the species. Two young Herring Gulls which I have, and

which I saw in the flesh at Couch's shop just after they had been shot,

seem to me worthy of some notice as showing the gradual change of

plumage in the Herring Gull; they were shot on the same day, and appear

to me to be one exactly a year older than the other; they were killed in

November, when both had clean moulted, and show examples of the second

and third moult. No. 1, the oldest, has the back nearly uniform grey,

and the rump and upper tail-coverts white, as in the adult. In No. 2,

the younger one, the grey feathers on the back were much mixed with the

brownish feathers of the young bird, and there are no absolutely white

feathers on the rump and tail-coverts, all of them being more or less

marked with brown. The tail in No. 2 has the brown on it collected in

large and nearly confluent blotches, whilst that of No. 1 is merely

freckled with brown. But perhaps the greatest difference is in the

primary quills; the first four primaries, however, are much alike, those

of No. 1, being a little darker and more distinctly coloured; in both

they are nearly of a uniform colour, only being slightly mottled on the

inner web towards the base; there is no white tip to either. In No. 1

the fifth primary has a distinct white tip; the sixth also has a decided

white tip, and is much whiter towards the base, the difference being

quite as perceptible on the outer as on the inner web. The seventh has a

small spot of brown towards the tip on the outer web, the rest of the

feather being almost uniform pale grey, with a slightly darker shade on

the outer web, and white at the tip; the eighth grey, with a broad

white tip. In No. 2 the fifth primary has no white tip; the sixth also

has no white tip, and not so much white towards the base; the seventh is

all brown, slightly mottled towards the base, and only a very slight

indication of a white tip; and the eighth is mottled throughout. I think

it worth while to mention these two birds, as I have their exact dates,

and the difference of a year between them agrees exactly with young

birds which I have taken in their first feathers and brought up tame. I

may also add, with regard to change of plumage owing to age, that very

old birds do not appear to get their heads so much streaked with brown

in the winter as younger though still adult birds, as a pair which I

caught in Sark when only flappers, and brought home in July, 1866, had

few or no brown streaks about their heads in the winter of 1877-8, and

in the winter of 1878-9 their heads are almost as white as in the

breeding-season. These birds had their first brood in 1873, and have

bred regularly every year since that time, and certainly have

considerably more white on their primary quills than when they first

assumed adult plumage and began to breed. Probably this increase of

white on the primaries as age increases, even after the

full-breeding-plumage is assumed, is always the case in the Herring

Gull, and also in both the Lesser and Greater Black-backs, thus

distinguishing very old birds from those which, though adult, have only

recently assumed the breeding-plumage. I know Mr. Howard Saunders is of

this opinion, certainly as far as Herring Gulls are concerned. Besides

the live ones, two skins I have, both of adult birds, as far as

breeding-plumage only is concerned, are evidently considerably older

than the other. No. 1, the youngest of these,--shot in Guernsey in

August, when just assuming winter plumage, the head being much streaked,

even then, with brown, showing that though adult it was not a very old

bird,--has the usual white tip on the first primary, below which the

whole feather is black on both webs, and below that a white spot on both

webs, for an inch; the white, however, much encroached upon on the outer

part of the outer web by a margin of black. In No. 2, probably the older

bird, the first primary has the white tip and the white spot running

into each other, thus making the tip of the feather for nearly two

inches white, with only a slight patch of black on the outer web. On the

second primary of No. 1 the white tip is present, but no white spot; but

on the same feather of No. 2 there is a white spot on the inner web,

about an inch from the white tip; this would, probably, in a still older

bird, become confluent with the white tip, as in the first primary. I

have not, however, a sufficiently old bird to follow out this for

certain. In No. 1, the older bird, the pale grey on the lower part of

the feathers also extends farther towards the tip, thus encroaching on

the black of the primaries from below as well as from above. I think

these examples are sufficient to show that the white does encroach on

the black of the primaries as the bird grows older, till at last, in

very old birds, there would not be much more than a bar of black between

the white tip and the rest of the feather; and this is very much the

case with the tame ones I caught in Sark in 1866, and which are

therefore, now in the winter of 1879, twelve and a half years old; but I

do not believe that at any age the black wholly disappears from the

primaries, leaving them white as in the Iceland and Glaucous Gulls. The

Herring Gull is an extremely voracious bird, eating nearly everything

that comes in its way, and rejecting the indigestible parts as Hawks do.

Mr. Couch, in the 'Zoologist' for 1874, mentions having taken a

Misseltoe Thrush from the throat of one; and I can quite believe it,

supposing it found the Thrush dead or floating half drowned on the

water. I have seen my tame ones catch and kill a nearly full-grown rat,

and bolt it whole; and young ducks, I am sorry to say, disappear down

their throats in no time, down and all. They are also great robbers of

eggs, no sort of egg coming amiss to them; Guillemots' eggs, especially,

they are very fond of; this may probably account for there being no

Guillemots breeding in Guernsey or Sark, and only a very few at

Alderney; in fact, Ortack being the only place in the Channel Islands in

which they do breed in anything like numbers.

Professor Ansted includes the Herring Gull in his list, but only marks

it as occurring in Guernsey and Sark. There are two, an old and a young

bird, in the Museum.

Birds of Guernsey (1879) And the Neighbouring Islands: Alderney, Sark, Jethou, Herm; Being a Small Contribution to the Ornitholony of the Channel Islands · 第 11 / 13 段