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Black-tailed Gull (Larus crassirostris) - Wiki
Subject: Black-tailed Gull (Larus crassirostris) - Wiki
Laridae in Beijing Zoo-Black-tailed Gull (Larus crassirostris).jpg
Resolution: 2592x1944 File Size: 979825 Bytes Date: 2005:11:26 16:01:38 Camera: (Samsung Techwin) F number: f/4.5 Exposure: 1/160 sec Focal Length: 189/10 Upload Date: 2007:01:11 17:15:25

Black-tailed Gull (Larus crassirostris) - Wiki

Black-tailed Gull
From Wikipedia, the free encyclopedia

[Photo] ???. 2005年于北京???物???

The Black-tailed Gull (Larus crassirostris) is a medium-sized (46cm) gull. It's wingspan measures 126-128 cm. The bird is resident in East Asia, including China, Japan and Korea. It is a vagrant to Alaska and northeastern North America.

It has yellow legs and a red and black spot at the end of the bill. This gull takes 4 years to reach full adult plumage. As the name suggests, it has a black tail. The bird has a cat-like call, giving it its Japanese name ??? Umineko, "Sea cat" and Korean name ??? Gwaeng-yi gull, which means "cat" gull.

The Black-tailed Gull feeds mainly on small fish, molluscs, crustaceans and offal. It often follows ships and commercial fishing fleets. It does steal food from other seabirds.

It is a colonial nester, with colonies forming in mid-April. 2-3 eggs are laid by early June. Incubation lasts approximately 24 days.

A rare visitor to the United States, a black-tailed gull was spotted from Burlington, Vermont, in October of 2005.
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Black-tailed gull
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