Ring-necked Duck

Mating pair.
Male: White and black body; all black head. Top of head has a thicker crest. Deep orange eyes. At the meeting of the head and beak there is a white stripe. Most of the beak is black but a strip toward the end near where it curves down.
Female: All brown. Side and underside is lighter brown with darker brown in it. Black eyes. Beak is black all but a strip toward the end near where it curves down.