Green-Winged Teal

 
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   Description
ADULT MALE Has chestnut-orange head with green patch through eye, faintly bordered with yellow. Plumage is otherwise gray and finely marked, except for striking vertical white stripe on side of breast, and black-bordered yellow vent. Bill is dark gray. Eclipse male resembles adult female.
ADULT FEMALE Has rather uniform mottled gray-brown plumage; green speculum is sometimes glimpsed in feeding birds. Bill is mainly gray, but with hint of yellow at base.
JUVENILE Similar to adult female, but plumage is lighter buff.

Dimensions
Length: 12-16"

Voice
Male utters a ringing whistle, while female utters a soft quack.

Discussion
Tiny dabbling duck. Gregarious outside breeding season. Typically nervous and takes flight-rising almost vertically from the water's surface-at slightest sign of danger. In flight, both sexes show a green speculum, highlighted by white borders. Sexes are otherwise dissimilar. Feeds on aquatic vegetation and, in summer, invertebrates too.