The collared plover (Charadrius collaris) is a small shorebird in the plover family, Charadriidae. It lives along coasts and riverbanks of the tropical to temperate Americas, from central Mexico south to Chile and Argentina.This small plover is 18 centimetres (7.1 in) long and weighs 35 grams (1.2 oz). Its upperparts are brown and the underparts white in all plumages. Adults have a black breast band.