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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).
The species was first described by Scottish naturalist John Richardson in 1831 as the 'short-billed mew gull', Larus brachyrhynchus. [2]Though some authorities, including the American Ornithologist's Union from 1931 onwards, have long considered brachyrhynchus to be a subspecies of the common gull, others have recognized the two as distinct species. [3]
Yellow-legged gull (L. michahellis) (including the form atlantis) and Armenian gull (L. armenicus) are treated as separate species from the European herring gull; Caspian gull (L. cachinnans) is treated as a separate species from European herring and yellow-legged gulls, and is defined as including the forms barabensis and mongolicus
The California gull (Larus californicus) is a medium-sized gull, smaller on average than the herring gull, but larger on average than the ring-billed gull (though it may overlap in size with both). Although named after California , it can be found annually across most of western North America, from the Canadian prairie provinces in the ...
The little gull (Hydrocoloeus minutus), is a species of gull belonging to the family Laridae which is mainly found in the Palearctic with some colonies in North America. It breeds on freshwaters and spends winters at sea. It is the smallest species of gull in the world and the only species in the monospecific genus Hydrocoloeus.
The ivory gull (Pagophila eburnea) is a small gull, the only species in the genus Pagophila. It breeds in the high Arctic and has a circumpolar distribution through Greenland , northernmost North America , and Eurasia .
RSPB says the UK's gull population has declined by more than 60% since 1970, with overfishing and climate change among the suspected causes. Bird flu has also claimed thousands of sea birds ...
The laughing gull (Leucophaeus atricilla) is a medium-sized gull of North and South America. Named for its laugh-like call, it is an opportunistic omnivore and scavenger . It breeds in large colonies mostly along the Atlantic coast of North America, the Caribbean , and northern South America.