April 14, 2014
A buoyant, large-headed duck that abruptly vanishes and resurfaces as it feeds, the tiny Bufflehead spends winters bobbing in bays, estuaries, reservoirs, and lakes. Males are striking black-and white from a distance. A closer look at the head shows glossy green and purple setting off the striking white patch.
Bufflehead nest in old woodpecker holes, particularly those made by Northern Flickers, in the forests of northern North America.
Source Cornell Lab or Ornithology