great black-backed gull


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Synonyms for great black-backed gull

white gull having a black back and wings

References in periodicals archive ?
In addition, 2%-10% of the wintering population of great black-backed gulls (Larus marinus) and 11%-39% of the wintering population of peregrine falcons (Falco peregrinus) were similarly affected.
Because of the benefits of nesting in island colonies, we find it surprising that the Sabine's Gull population on the YKD maintains considerable behavioral variation in nest-site selection and the size of nesting aggregations, as also occurs in a number of other gull species, including the Ivory Gull, Little Gull, Black-headed Gull (Larus ridibundis), Great Black-backed Gull, and Herring Gull (Larus argentatus) (Gotmark 1982; Stenhouse and others 2001).
Typical clutch size is 1--3 eggs.The Great Black-backed Gull (Larus marinus) is a very large gull which breeds on the European and North American coasts and islands of the North Atlantic.
Great black-backed gulls, great skuas, and northern gannets out compete other birds for discard from boats.
Adam had his huge spotting scope with him, and we quickly picked off herring and great black-backed gulls on buoys downriver.
Great black-backed gulls - up to twice the size of the gulls we normally see in towns - are the top predators at sea colonies in the wild.
The mild-mannered great black-backed gulls - up to twice the size of herring gulls normally seen in urban areas - are being seen increasingly in town and city areas, a European expert on urban gulls said.
data) and about 225 bp of gulls, composed of herring gulls (Larus argentatus) and great black-backed gulls (Larus marinus).
You will see Great Egrets, Snowy Egrets, Glossy Ibises, Cormorants, Great Black-backed Gulls, and Night Herons--all roosting within a wing's flap of the Empire State Building.
The adults provide a spectacular sight if predators - including herons and herring or great black-backed gulls - pass overhead.
There are laughing gulls, herring gulls, ring-billed gulls, great black-backed gulls, and many others.
Displacement by herring and great black-backed gulls probably has been the primary cause of the concentration of roseate terns into a few major colony sites, as well as an important factor in their overall decline in the Northeast since the 1930's.
Many chicks were preyed upon by Herring Gulls Larus argentatus, Great Black-backed Gulls L.
"Duckling counts decreased thereafter, possibly as a result of predation by great black-backed gulls and few were thought to have survived to fledging," the report said.