LESSER BLACK-BACKED GULL.
Very similar in appearance, but much smaller in size—it is only about half the weight—this pretty Gull, the Larus fuscus of Linnæus, is one of the most familiar birds of the coast, especially in the more northerly portions of the British Islands. It is a more trustful species than its larger ally, admits man to approach it with less show of fear or wariness, and may often be seen on the meadows and ploughed fields near the sea, seeking for its food as familiarly as a Rook or a Daw. Singularly enough, the east and south coasts of England are not resorted to by this Gull for breeding purposes. It is not known to breed south of the coast of Northumberland, or east of that of Devonshire; and this is all the more remarkable, seeing that one of its most important colonies in our area is situated upon the Farne Islands. It breeds locally from Cornwall to the Solway, but further northwards becomes more generally dispersed, right up to the Orkneys and the Shetlands. In Ireland, again, this Gull is a very local breeder, and is only known to nest in one or two localities. During the non-breeding season it wanders far from home, and may then be met with on and off most of the British coasts: young and immature birds do not resort much to the nesting colonies, but roam widely at all seasons. It is a very remarkable fact that adult Gulls of this species are so rarely seen near Heligoland, as the species breeds commonly on the Baltic and Scandinavian coasts, and yet its average appearance at the island is about once in ten years! The Heligolandish name for this Gull is very appropriate, signifying “little mantle wearer,” and refers to the dark slate-gray mantle. Unlike its larger ally the present species is very gregarious, and socially inclined at all seasons, mixing freely not only with its own kind, but with the Herring Gull and the smaller forms, such as the Kittiwake, and the Common Gull. These latter birds, however, must too often prefer its room to its company, for it repeatedly robs them of their prey, and is, Gull-like, ever ready to profit by the labours of its weaker congeners. Like the preceding species it is almost omnivorous in its tastes, and will as readily make a meal from stranded garbage on the shore, as from the living fish it deftly swoops upon as they swim near the surface. On the Lincolnshire coasts it visits the flight nets, in company with the Hooded Crows, and preys upon any birds that may be entangled in them. It is also a persistent follower of ships, attending the trawlers, and feeding upon the refuse fish cast overboard when the trawl net is emptied. It swims lightly enough even on a rough sea, riding like a cork on the wave-crests, and sleeps upon the water, when roaming far from land. Flocks of this Gull may often be seen standing upon the mud-flats or level sandy reaches, preening their plumage, and waiting, it may be, for a turn of the tide that may bring some particular food of which they are in quest. It will be remarked that these larger Gulls, especially, often run for a short distance before taking flight, and that when alighting they frequently keep their long wings unfolded and erect for a moment or two before finally closing them. Great numbers of Lesser Black-backed Gulls and other species collect in Tor Bay during the herring and sprat seasons, and at these times they will wait and watch about the harbours and quays in fluttering hosts for the odd fish and offal. The note of this Gull very closely resembles that of the Herring Gull, so closely, in fact, that no symbol can denote the difference. It may be syllabled as klĭ-ou-klĭ-ou, and during the breeding season is very persistently uttered. Owing to its relatively longer wings, this Gull looks more graceful in the air than its larger and heavier congener: its flight is remarkably easy and buoyant, and on occasion rapid.
The usual breeding places of the Lesser Black-backed Gull are low rocky islands—these larger Gulls always prefer an island, covered with coarse marine grass, sea campion, and the like—but in some localities a rock stack, an island in an inland lake, on grassy downs, in mosses, and flows. This Gull usually breeds in colonies, and some of these are very large. One of the most extensive, within the present writer’s experience, is situated on the Farne Islands. The entire group of islands may be regarded as one vast colony of Lesser Black-backed Gulls, if we except a few of the outlying rocks, where the Cormorants breed. It is more than likely that this Gull pairs for life, seeing that it resorts to the same nesting places, year by year, for time out of mind. The nest, even in the same colony, varies a good deal in size and general completeness. Some birds are content merely to line a hollow in the rocks with a little dry grass; others are more bulky yet slovenly structures, rude heaps of turf, heather stems, sea campions, or dry grass and sea-weed, the lining being composed of finer grasses, many of them often semi-green. Occasionally a feather or two are seen, but these may be due more to accident than to design. Few sights in the bird-world are prettier than a colony of disturbed Gulls during the breeding season. As their haunts are invaded, the frightened birds rise in fluttering thousands, drifting to and fro like a snowstorm, in which each flake is a startled bird. The noisy din, the rush of wings, the swooping, soaring, fluttering Gulls, the ground strewn with nests—all combine to form a picture in the mind that time can never efface! The eggs of this Gull are usually three in number, sometimes as many as four. They vary to an almost incredible degree. The ground colour varies from pale green to dark olive-brown and gray, spotted, blotched, or streaked with dark liver-brown, pale brown and gray. Vast numbers of the eggs of this Gull are collected for food, especially at the Farne Islands. The birds do not appear to suffer in any way by this systematic pillage, for they are always allowed to rear a brood from a second clutch at the Farnes, and most rigorously protected whilst doing so.