The Green-winged Teal is a common and widespread duck which breeds in the northern areas of North America except on the Aleutian Islands.
This dabbling duck is strongly migratory and winters far south of its breeding range. It is highly gregarious outside of the breeding season and will form large flocks. In flight, the fast, twisting flocks resemble waders.
This is the smallest North American dabbling duck. The breeding male has grey flanks and back, with a yellow rear end and a white-edged green speculum, obvious in flight or at rest. It has a chestnut head with a green eye patch.
The females are light brown, with plumage much like a female Mallard.
It is a common duck of sheltered wetlands, such as taiga bogs, and usually feeds by dabbling for plant food or grazing. It nests on the ground, near water and under cover.
This is a noisy species. The male has a clear whistle, whereas the female has a feeble "quack".