The red knot or just knot is a medium-sized shorebird which breeds in tundra and the Arctic Cordillera in the far north of Canada, Europe, and Russia. It is a large member of the Calidris sandpipers, second only to the great knot. Six subspecies are recognised.
Image: Red Knot for Wiki
Image: Red Knot 1 Boat Harbour
Large flocks of C. c. islandica winter in the coastal marshes of Britain, along with other waders. The Wash, Norfolk
Nonbreeding adult
Waders or shorebirds are birds of the order Charadriiformes commonly found wading along shorelines and mudflats in order to forage for food crawling or burrowing in the mud and sand, usually small arthropods such as aquatic insects or crustaceans. The term "wader" is used in Europe, while "shorebird" is used in North America, where "wader" may be used instead to refer to long-legged wading birds such as storks and herons.
Wader
Waders roosting on the beach at high tide
Waders in flight
Common ringed plover wading on a shore