“The Wilson’s Phalarope, Phalaropus tricolor, is a small wader. This bird, the largest of the phalaropes, breeds in the prairies of North America in western Canada and the western United States. It is migratory, wintering around the central Andes in South America. They are passage migrants through Central America around March/April and again during September/October. The species is a rare vagrant to western Europe.
Wilson’s Phalarope is about 23 centimetres (9.1 in) in length, with lobed toes and a straight fine black bill. The breeding female is predominantly gray and brown above, with white underparts, a reddish neck and reddish flank patches. The breeding male is a duller version of the female, with a brown back, and the reddish patches reduced or absent.
Young birds are grey and brown above, with whitish underparts and a dark patch through the eye. In winter, the plumage is essentially grey above and white below, but the dark eyepatch is always present." Wikipedia