Their wintering range includes the western United States, Mexico, and the southern United States. Two other subspecies of the Teal, A. c. crecca and A. c. nimia, can be found in Eurasia and the Aleutian Islands. The Teal is the smallest dabbling duck in the Americas. Its bill is narrow and black.
Teals are sexually dimorphic.
Males have a cinnamon colored head with an iridescent green crescent spanning from one eye, around the back of the head, to the other eye. The sides and back are actually marked with tiny black and white stripes, although they appear grey. Their wings and tail are a tannish-brown color, with pale yellow feathers along the side of the tail. Females are entirely tannish-brown, except for their white chin and belly. Green-winged Teals feed on almost any plant or animal in high abundance, largely in shallow waters, near the shoreline or in mudflats.