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The Pacific gull is a large white-headed gull with a distinctively heavy bill.. Gulls range in size from the little gull, at 120 grams (4 + 1 ⁄ 4 ounces) and 29 centimetres (11 + 1 ⁄ 2 inches), to the great black-backed gull, at 1.75 kg (3 lb 14 oz) and 76 cm (30 in).
Western Gull in flight over the cliffs of Bodega Head. The western gull is a large gull that can measure 55 to 68 cm (22 to 27 in) in total length, spans 130 to 144 cm (51 to 57 in) across the wings, and weighs 800 to 1,400 g (1.8 to 3.1 lb). [3] [4] The average mass among a survey of 48 gulls of the species was 1,011 g (2.229 lb). [5]
In flight, the white leading edge of the outer wing (the outer primaries) is a good field mark, particularly combined with the dark underside of the inner primaries, which distinguishes it from the white underside of those feathers in its close relative the Bonaparte's gull. The summer adult has a chocolate-brown head (not black, although does ...
The short-billed gull is a small gull with a length 40–45 cm (16–18 in) and a wingspan 100–120 cm (39–47 in). It is smaller than other gulls in the Common gull complex, with a shorter bill and longer wings. [5] Its wings appear long and narrow in flight relative to its short body.
[1] [2] A close relative of the common swift, the white-throated needletail (Hirundapus caudacutus), is commonly reported as the fastest bird in level flight with a reported top speed of 169 km/h (105 mph). This record remains unconfirmed as the measurement methods have never been published or verified.
Some fully-fledged or adult birds observed to be hunted in flight or on the ground by great black-backed gulls have included Anas ducks, ruddy ducks (Oxyura jamaicensis), buffleheads (Bucephala albeola), Manx shearwaters (Puffinus puffinus), pied-billed grebes (Podilymbus podiceps), common moorhens (Gallinula chloropus), terns, Atlantic puffins ...
In flight, in Oman. They are large gulls with a rounded head, strong bill and long legs and wings. Length is from 53 to 70 cm (21 to 28 in), wingspan is from 138 to 158 cm (54 to 62 in) and body mass is from 745 to 1,360 g (1.642 to 2.998 lb). [4]
Young birds resemble winter adults, but have a dark "W" pattern on the wings in flight, like young little gulls, and lack the pink tones. The juveniles take two years to attain full adult plumage. Ross's gull measurements: [5] Length: 29–31 cm (11–12 in) Weight: 140–250 g (4.9–8.8 oz) Wingspan: 90–100 cm (35–39 in)