In winter plumage the head and neck are mostly off-white to grayish; the underparts are white; the wings and back have a pattern of broad black and white stripes when standing and more of a chevron pattern in flight.
In breeding plumage the head and neck of males is a beautiful cinnamon color with the remainder of the plumage being very close to the winter plumage pattern.

Birds in winter plumage. Eco Pond, Flamingo Visitor Center area, Everglades National Park, Florida, USA, 24 November 2012