The LARGE or GLAUCOUS WHITE-WINGED GULL (_Larus glaucus_) is almost entirely white, with a faint blue tinge upon the back and wing-covers; the primaries are also white, and extend but little beyond the end of the tail. The bill is yellowish white, except upon the inferior angle of the lower mandible, which is reddish orange; the eyes are pale yellow, and legs and feet flesh-red. In winter the head and neck are slightly streaked with dark grey. The length of this species is about thirty inches; the wing measures nine and a half, and the tail eight inches and a half; according to Yarrell, some have been taken that measured thirty-two and thirty-three inches. The White-winged Gull is an inhabitant of the high latitudes, and was found in great numbers by our Arctic voyagers in the Polar Seas, Davis' Straits, and Baffin's Bay, breeding on precipitous rocks and ledges of cliffs. The Glaucous Gull is also common in Russia, on the shores of the Baltic, and has been found in France, Germany, Holland, and various parts of our own and the Irish coast. It visits Shetland about the middle of autumn, and departs about the end of spring. It frequents open bays, and attends fishing-boats a few miles from land, in order to feed upon any refuse that may be thrown overboard. Sometimes, if allured by carrion, it will even venture inland. This Gull is very rapacious, and when deprived of other food will fall upon small birds and eat them. Sir J. Richardson tells us it feeds upon carrion, and during Captain Ross's expedition one specimen when struck disgorged an Auk, and after death another was found in its stomach. In disposition it is shy and inactive, and exhibits little of the clamorousness observable in most other members of the genus. The Dutch have bestowed the name of "Burgomaster" upon this bird; and, according to Scoresby, it may with propriety be called the chief magistrate of the feathered tribe in the Spitzbergen regions, as none of its class dare dispute its authority, when with unhesitating superiority it descends on its prey, though in the possession of another. The "Burgomaster" is not a numerous species, and yet it is a general attendant on the whale-fishers, whenever any spoils are to be obtained. It then hovers over the scene of action, and having marked out its morsel, descends upon it, and carries it off on the wing. On its descent, the most dainty food must be relinquished, though in the grasp of the Fulmar Petrel, the Ivory Gull, or the Kittiwake. It seldom alights in the water; when it rests on the ice it selects a hummock, and fixes itself on the highest pinnacle. Sometimes it condescends to take a more humble situation, that offers any advantages for procuring food. Upon these occasions the peculiarity of its appearance is very striking. Its usual deportment is grave and imposing, exhibiting little of the vivacity or inquisitiveness of many of its tribe; it is roused to exertion chiefly by a sense of danger, or the cravings of hunger.