Part 62

Little Gull, imm.

Kittiwake

Brown-headed Gull

Twist Tailed or Pomatorhine Skua

Richardson's Skua

Great Shearwater

Great Skua]

SUB-FAMILY STERCORARIINÆ (ROBBER GULLS)

THE GREAT SKUA STERCORARIUS CATARRHÁCTES

Upper plumage brown, of several shades; shafts of the quills, basal half of the primaries, and shafts of the tail-feathers, white; under, reddish grey, tinged with brown; two central tail-feathers but slightly elongated, not tapering; tarsus two and a half inches long, somewhat rough at the back. Length twenty-five inches. Eggs olive-brown, blotched with brown.

The Skuas, called also Skua Gulls, are sufficiently distinguished from the true Gulls by their strong hooked bills and talons, and by the habits of daring and voracity founded on these characters. The present species, though called common, is only to be so considered in high latitudes; for it is very rarely seen on the coasts of England, and has become scarce even in the Shetland Islands, where it was at one time frequent. Mr. Dunn says: "I never saw this bird in Orkney, and there are only three places in Shetland where it breeds--viz. Foula, Rona's Hill, and the Isle of Mist; in the latter place it is by no means numerous, and is strictly preserved by the landlords, on whose property it may have settled, from a superstition that it will defend their flocks from the attacks of the Eagle. That it will attack the Eagle if he approaches their nests is a fact I have witnessed: I once saw a pair completely beat off a large Eagle from their breeding-place, on Rona's Hill. The flight of the Skua is stronger and more rapid than that of any other Gull. It is a great favourite with the fishermen, frequently accompanying their boats to the fishing-ground, or Haaf, which they consider a lucky omen; and in return for its attendance, they give it the refuse of the fish which are caught. The Skua Gull does not associate in groups; and it is seldom that more than a pair are seen together. During the breeding season it is highly courageous; and will strike furiously at, and will even pursue, any one who may happen to approach its nest, which is constructed among the heath or moss; the female laying two eggs."

Some authors state that the Common Skua obtains its livelihood by levying contributions on the White Gulls, compelling them to disgorge their prey, and catching it before it reaches the water; but Dr. Edmonston, who had great opportunities of watching the habits of these birds, says that they do not adopt the practises correctly attributed to the Arctic Gull, or Richardson's Skua. The voice of the Common Skua is said to resemble that of a young Gull, being sharp and shrill; and it is from the resemblance of its cry to that of the word Skua, or Skui, that it obtains its popular name. That it is remarkably courageous and daring, all accounts agree. Mr. Low says that, when the inhabitants are looking after their sheep on the hills, the Skua often attacks them in such a manner that they are obliged to defend themselves with their cudgels held above their heads, on which it often kills itself; and Captain Vetch, In the Memoirs of the Wernerian Society, says that it not only drives away Ravens and Eagles, but that the larger quadrupeds, such as horses and sheep, which venture near its nest, are immediately put to flight. Its northern name is Bonxie.

Ornithologist's Guide to Orkney and Shetland, p. 112.

TWIST-TAILED OR POMATORHINE SKUA STERCORARIUS POMATORHINUS

Upper plumage uniform dark brown; feathers of the nape long, tapering lustrous; sides of the face and under plumage white; a collar of brown spots on the breast, and similar spots on the flanks; shafts of the quills and tail-feathers white, except at the tip; two central tail-feathers projecting three inches, not tapering; tarsus two inches long, rough at the back, with projecting scales. Length twenty-one inches. Young birds--upper plumage dusky brown, mottled with reddish yellow; under, yellowish white, thickly set with brown spots and bars. Eggs ash-green, spotted with dusky.

The habits of this bird vary but little from those of the other species. Its home is in the Arctic seas, from which it strays southwards in winter, and has been occasionally seen on our coasts. The following account of the capture of one of these birds, in 1844, indicates a bird of unusual daring and voracity: "About the beginning of last October, a Pomarine Skua was taken in the adjoining village of Ovingdean. It had struck down a White Gull, which it would not quit: it was kept alive above a fortnight, and then died. The very first day of its captivity it (is said to have) devoured twenty-five Sparrows. Once it escaped, and immediately attacked a Duck, which it held till recaptured."

Zoologist, vol. iii. p. 880.

RICHARDSON'S SKUA STERCORARIUS CREPIDATUS

Crown dusky; cheeks, neck, and under plumage white, tinged with yellow or brown; rest of the plumage dusky, the wings and tail the darkest. Two central tail-feathers tapering from the base, pointed, and projecting six inches; tarsus less than two inches. Length twenty-one inches. Eggs olive, with a circle of brown spots near the larger extremity, the rest speckled with the same colour.

This species of Skua, most familiarly known, perhaps, as the Arctic Gull, received its distinctive name, 'Richardson's', in honour of the eminent Arctic naturalist. It is distinguished from the species already described by its longer tail, but the habits of all are much alike; indeed, the names of 'Arctic Gull', 'Boatswain', 'and Man-of-War', appear to be sometimes employed indiscriminately. Richardson's Skua, like the rest, inhabits the Arctic seas, but extends its wanderings southwards in far greater numbers than either of the other species, so that its occurrence on the east coast of England is not unusual. According to Mr. Dunn, 'numbers of this bird breed in Orkney and Shetland, appearing regularly in May and leaving in August: it is confined to a few situations and is strictly preserved, from the same motive as the Skua Gull. It constructs its nest on low, not mossy, heaths in exposed situations. The female lays two eggs, and has recourse to the same stratagems that the Plover employs to decoy you from the nest; but when a person approaches near to the place where the nest is built, becomes bold and fierce, and strikes severely with the feet and bill.' The following account is taken from Mr. St. John's Wild Sports of the Highlands: "I was much amused the other day by the proceedings of a pair of the Black-toed Gull or Boatswain. These two birds were sitting quietly on an elevated ridge of sand, near which a number of other Gulls of different kinds were fishing, and hovering about in search of what the waves might cast up. Every bird, indeed, was busy and employed, excepting these two black robbers, who seemed to be quietly resting, quite unconcerned. When, however, a Gull had picked up a prize, these birds seemed instinctively to know it, and darting off with the rapidity of a Hawk (which bird they much resemble in their manner of flight), they attacked the unfortunate Gull in the air, and in spite of his screams and attempts to escape, they pursued and beat him till he disgorged the fish or whatever he had swallowed, when one of them darted down and caught the substance before it could reach the water. The two then quietly returned to their sandbank, where they waited patiently to renew the robbery, should an opportunity occur. As the flock of Gulls moved on with the flow of the tide, the Boatswains moved on also, hovering on their flank like a pair of plundering freebooters. I observed that, in chasing a Gull, they seemed perfectly to understand each other as to who should get the spoil; and in their attacks on the largest Gulls (against whom they waged the most fearless warfare), they evidently acted so as to aid each other. If another pair of Boatswains intruded on their hunting-ground they immediately seemed to send them further off; not so much by actual battle, as by a noisy and screaming argument, which they continued most vigorously till the new-comers left the neighbourhood.

"I never saw these birds hunt for their own living in any other way than by robbing the other Gulls. Though not nearly so large as some of the birds which they attack, their Hawk-like swoops and great courage seem to enable them to fight their way most successfully. They are neatly and powerfully made, their colour a kind of sooty dull black, with very little gloss or shining tints on their feathers."

Black Guillemot

Puffin

Guillemot

Razor-bill

Red-throated Diver Winter and Summer.

Black-throated Diver imm. and

Little Auk