Thai gull
| Thai gull | ||||||||||||
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Thayer gull ( Larus thayeri ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Larus thayeri | ||||||||||||
| WS Brooks , 1915 |
The Thayer gull ( Larus thayeri ) is a monotypical species within the gulls (Larinae). It bears its name in honor of the American amateur ornithologist John Eliot Thayer (1862–1933). The IUCN classifies the Thay gull as harmless ( least concern ).
Appearance
The Thayermöwe reaches a body size of 55 to 63 centimeters. The wingspan is 142 to 152 centimeters. The weight varies between 700 and 1,100 grams.
In breeding plumage , the Thayer's Gull a very close resemblance to the herring gull on. The beak is yellow with a red spot at the tip of the beak. The inside of the beak is bright pink. The iris is dark yellow-brown in most individuals, around ten percent of the population have yellow eyes. The legs and feet are reddish. The eye ring is bright red. The wings are gray, the wings have black and white feather tips.
In the plain dress , the head of the Thaya gull is dashed in dark brown.
Distribution area
The Thaya gull is a Nearctic species. It breeds on the west coast of Hudson Bay and on the arctic islands of Canada. It is a migratory bird that occurs on the west coast of North America in the winter months. It can be seen here from British Columbia to California .
Way of life
The Thaya gull mainly eats fish; crustaceans and mollusks also play a minor role in the diet. Thai seagulls also eat young birds and eggs of other bird species and also accept carrion. Inland birds also eat a small amount of berries and seeds.
The Thai gull lives sociable all year round and nests in colonies. It is often associated with other species of seagulls. The males defend their nest against other males. The clutch usually consists of three eggs, which are incubated by both parent birds. The chicks can fledge at 25 to 30 days.
supporting documents
literature
- Richard Sale: A Complete Guide to Arctic Wildlife , published by Christopher Helm, London 2006, ISBN 0-7136-7039-8
Single receipts
Web links
- Larus thayeri inthe IUCN 2013 Red List of Threatened Species . Listed by: BirdLife International, 2012. Retrieved September 16, 2013.