Blue-winged Teal

A small dabbling duck, a Blue-winged Teal is dwarfed by a Mallard and only a touch larger than a Green-winged Teal. Head is rounded and bill is on the large side.
Breeding males are brown-bodied with dark speckling on the breast, slaty-blue head with a white crescent behind the bill, and a small white flank patch in front of their black rear. Females and eclipse males are a cold, patterned brown. In flight, they reveal a bold powder-blue patch on their upperwing coverts.