The largest of the Gull Tribe is the Great Black-backed Gull, which is, furthermore, a common British bird; indeed, it is frequently seen flying, together with the last-mentioned species, on the Thames, doing its best to get a full share of the tit-bits thrown by interested spectators from the various London bridges. Unlike the black-headed gull, it has no seasonal change of plumage, but is clad all the year round in the purest white, set off by a mantle of bluish black. The young of this bird has a quite distinct plumage of greyish brown, and hence has been described as a distinct species—the Grey Gull. This dress is gradually changed for the adult plumage, but the process takes about three years.
Photo by W. F. Piggott] [Leighton Buzzard.
CURLEW.
So called on account of its note.
The Kittiwake is another of the common British gulls, breeding in thousands in favourable localities on the coasts. Its eggs are deposited on the narrowest and most inaccessible ledges of precipitous cliffs. This species sometimes falls a victim to the fashion of wearing feathers. "At Clovelly," writes Mr. Howard Saunders, "there was a regular staff for preparing plumes; and fishing-smacks, with extra boats and crews, used to commence their work of destruction at Lundy Island by daybreak on the 1st of August.... In many cases the wings were torn off the wounded birds before they were dead, the mangled victims being tossed back into the water." And he has seen, he continues, "hundreds of young birds dead or dying of starvation in the nests, through the want of their parents' care.... It is well within the mark to say that at least 9,000 of these inoffensive birds were destroyed during the fortnight."
Of the Skua-gulls there are several species. Their coloration differs from that of the gulls just described in being confined to shades of brown. One of their most remarkable traits is that of piracy. They await their cousins the Gulls coming shoreward from the sea with newly swallowed fish, and then, giving chase, compel the gull, in order to lighten itself and escape, to disgorge its hard-won meal. So swift of flight is the skua that the ejected morsel is caught before it reaches the water.
THE PLOVER TRIBE.
Birds of very various size, shape, and coloration are included in this group—that is to say, birds which vary much superficially, but, it must be understood, all undoubtedly closely related. In England they are to be met with almost everywhere. The seashore, the lonely moorland, the desolate marshes, the river's brink, or the woods—all these shelter some one or other of the Plover Tribe. Like the Gulls, many adopt a distinctive dress for the courting-season, which, however, is sometimes worn by the males only, and not by both sexes alike, as in the Gulls. One of the most striking and familiar instances of this change is seen in the Grey Plover. In winter the plumage of the upper-parts of this bird is dusky grey, that of the under-parts pure white; but in the spring the former is exchanged for a beautifully variegated mantle of black and white, and the latter becomes uniformly jet-black, save the under tail-coverts, which remain white.
