Great Black-headed Gull

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Great Black-headed Gull
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Charadriiformes
Family:Laridae
Genus:Larus
Species:L. ichthyaetus
Binomial name
Larus ichthyaetus
Pallas,, 1773

The Great Black-headed Gull or Pallas's Gull, Larus ichthyaetus, is a large gull.

This species breeds in colonies in marshes and islands from southern Russia to Mongolia. It is migratory, wintering in the eastern Mediterranean, Arabia and India. This gull nests on the ground, laying 2-4 eggs.

It occurs in western Europe only as a rare vagrant. In Great Britain a recent review left a single occurrence in 1859 as the only acceptable record of this bird.

This is a large gull, nearly the size of Great Black-backed Gull. It is 58-65 cm long with a 1.4 to 1.6 m wingspan. Summer adults are unmistakeable, since no other gull of this size has a black hood. The adults have grey wings and back, with conspicuous white "mirrors" at the wing tips. The legs are yellow, and the bill is red.

In all other plumages, a dark mask through the eye indicates the vestiges of the hood. The call is a deep aargh cry. Young birds attain largely grey upperparts quite rapidly, but they take four years to reach maturity.

These birds are predatory, taking fish, crustaceans, insects and even small mammals.ru:Рыболов

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