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Belcher's gull (Larus belcheri), also known as the band-tailed gull, is a bird in the family Laridae found along the Pacific coast of South America.It formerly included the very similar Olrog's gull as a subspecies, but that bird occurs on the Atlantic coast of South America and is now accepted as Larus atlanticus.
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).
Belcher's gull, common on northern coasts. Andean gull, breeds at high-altitude wetlands. Inca tern, common in the waters of the Humboldt Current. Order: Charadriiformes Family: Laridae. Laridae is a family of medium to large seabirds and includes gulls, kittiwakes, and terns. Gulls are typically gray or white, often with black markings on the ...
Gulls, along with other sea birds, have been falling in numbers. RSPB says the UK's gull population has declined by more than 60% since 1970, with overfishing and climate change among the ...
Belcher's gull or band-tailed gull Larus belcheri Vigors, 1829: the Pacific coast of South America. Size: Habitat: Diet: LC Black-tailed gull. Larus crassirostris Vieillot, 1818: coasts of the East China Sea, Japan, Manchuria and the Kuril Islands, to western Alaska in North America. Size: Habitat: Diet: LC Olrog's gull. Larus atlanticus Olrog ...
Laridae on Lake Baikal. The family Laridae was introduced (as Laridia) by the French polymath Constantine Samuel Rafinesque in 1815. [1] [2] Historically, Laridae were restricted to the gulls, while the terns were placed in a separate family, Sternidae, and the skimmers in a third family, Rynchopidae. [3]
Hartlaub's gull is 37–39 cm in length, with a wingspan of 89–92 cm and a weight of 235–340 g. It is a mainly white gull with a grey back and upperwings, black wingtips with conspicuous white "mirrors", and a dark red bill and legs. When breeding it has a very faint lavender grey hood, but otherwise has a plain white head.
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