**Description:** A small, sleek diving duck with a large, puffy head and a bold white "pie-slice" patch behind the eye.
**Size & Weight:** 13–16 inches long. Weighs 0.6–1.0 lb.
**Habitat:** Calm forest ponds, beaver dams, and sheltered reservoir coves.
**Behavior:** Incredibly fast fliers and agile divers; they nest in tree cavities.