Taken with a Sony Alpha 350 SLR,Tamron 70-300 lens and Kenko 2x tele converter giving focal length of 600mm. These birds are very hard to get close to on the shore. (Solway coast of Cumbria NW England near Port Carlisle)
The Bar-tailed Godwit (Limosa lapponica) is a large wader in the family Scolopacidae, which breeds on Arctic coasts and tundra mainly in the Old World, and winters on coasts in temperate and tropical regions of the Old World. It makes the longest known non-stop flight of any bird and also the longest journey without pausing to feed by any animal, 11,680 kilometres (7,258 mi) along a route from Alaska to New Zealand
The adult has blue-grey legs and a very long dark bill with a slight upward curve and pink at the tip. The neck, breast and belly are unbroken brick red in breeding plumage, off white in winter. The back is mottled grey.
It is distinguished from the Black-tailed Godwit (Limosa limosa) by its barred, rather than wholly black, tail and a lack of white wing bars (Source Wikipedia )