Ruff

The ruff is a long-necked, pot-bellied wader with a small head, a medium-length bill and a heavy body. The legs are long and variable in colour: dark greenish in juveniles and pink to orange in adults, with some males having reddish-orange legs only in the breeding season. In flight it has a deeper, slower wing stroke than other waders of similar size and shows a thin, indistinct white wing bar and white ovals on the sides of the tail. The species is markedly dimorphic: the male is much larger than the female, the reeve. (Wikipedia, general species account)

A medium-sized wading bird, it breeds in marshes and wet meadows across northern Eurasia. This highly gregarious sandpiper is migratory and sometimes forms huge flocks on its winter grounds, which include southern and western Europe, Africa, southern Asia and Australia. The breeding male carries brightly coloured head tufts, bare orange facial skin, extensive black on the breast and a large collar of ornamental feathers that inspired the English name. (Wikipedia, general species account)