Our smallest diving duck is easily recognized by its puffy head, short stubby bill, and rapid wingbeats. Male: Head is black with green and purple iridescence and a large white wedge. Underparts are bright white, upperparts black. In flight, shows a large white patch on wing coverts and secondaries. Young males resemble females. Female: Dark gray-brown on head, back and wings, lighter on underparts. A broad white line extends from just below the eye across the cheek. A dull white speculum is sometimes visible.

Length: 33 (cm) Wingspan: 51 (cm)

Voice:

Usually silent. Give chattering calls during courtship.

Habitat:

Nests in tree cavities near small lake and ponds. Winters in sheltered coastal bays and estuaries, lakes, and ponds.

Behavior:

Is known to occasionally nest in old Northern Flicker holes.

Feeding:

Dives for aquatic invertebrates.