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The food taken by gulls includes fish, and marine and freshwater invertebrates, both alive and already dead; terrestrial arthropods and invertebrates such as insects and earthworms; rodents, eggs, carrion, offal, reptiles, amphibians, seeds, fruit, human refuse, and even other birds. No gull species is a single-prey specialist, and no gull ...
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 .
The following is a list of errors in the corrected reprint: On page 21, the illustration of a gull's head, with a pointer highlighting an ear-spot, shows a bird with a full hood; ear-spots are a feature which appears on hooded gulls only when the hood (a feature of breeding plumage) is lost, in winter.
The Caspian gull (Larus cachinnans) is a large gull and a member of the herring and lesser black-backed gull complex. The scientific name is from Latin . Larus appears to have referred to a gull or other large seabird, and cachinnans means 'laughing', from cachinnare 'to laugh'.
The American herring gull or Smithsonian gull (Larus smithsonianus or Larus argentatus smithsonianus) is a large gull that breeds in North America, where it is treated by the American Ornithological Society as a subspecies of herring gull (L. argentatus). Adults are white with gray back and wings, black wingtips with white spots, and pink legs.
Young birds have scaly black-brown upperparts and a neat wing pattern. They take four years to reach maturity. Identification from juvenile herring gulls is most readily done by the more solidly dark (unbarred) tertial feathers. Their call is a "laughing" cry like that of the herring gull, but with a markedly deeper pitch.
Adult flying in Iceland Sabine's gull flying at the fjord Trygghamna in Spitsbergen. Sabine's gull is a small gull, 27 to 33 cm (10 + 1 ⁄ 2 –13 in) in length and weighing 135 to 225 g (4 + 3 ⁄ 4 – 7 + 15 ⁄ 16 oz). The wings are long, thin and pointed with a span of between 81 and 87 cm (32– 34 + 1 ⁄ 2 in). The bill, which is black ...
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.