Description
The Black-tailed Godwit is a large wader with long bill (7.5 to 12 cm long), neck and legs. During the breeding season, the bill has a yellowish or orange-pink base and dark tip; the base is pink in winter. The legs are dark grey, brown or black. The sexes are similar, but in breeding plumage, they can be separated by the male's brighter, more extensive orange breast, neck and head. In winter, adult Black-tailed Godwits have a uniform brown-grey breast and upperparts (in contrast to the Bar-tailed Godwit's streaked back). Juveniles have a pale orange wash to the neck and breast.
In flight, its bold black and white wingbar and white rump can be seen readily. When on the ground it can be difficult to separate from the similar Bar-tailed Godwit, but the Black-tailed Godwit's longer, straighter bill and longer legs are diagnostic. Black-tailed Godwits are similar in body size and shape to Bar-taileds, but stand taller.
It measures 42 cm from bill to tail with a wingspan of 70–82 cm. Males weigh around 280 g and females 340 g. The female is around 5% larger than the male, with a bill 12-15% longer.
The most common call is a strident weeka weeka weeka. A study of Black-tailed Godwits in the Netherlands found a mortality rate of 37.6% in the first year of life, 32% in the second year, and 36.9% thereafter.
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