Blue-winged Teal

Identification

The blue-winged teal is one of the smaller dabbling ducks, measuring 40 cm (16 in) long with a wingspan of 58 cm (23 in) and weighing around 370 g (13 oz). Males are distinctive and relatively easy to identify, featuring a greyish-blue head with a striking white facial crescent, a light brown body, a white patch near the rear, and a black tail. Females are more subdued, displaying mottled brown plumage with a whitish area at the base of the bill. Both sexes share key field marks: sky-blue wing coverts, a green speculum, and notably yellow legs. The male's call is a short whistle, while females produce a soft quack. These ducks undergo two molts per year, plus a third molt during their first year.

Range & habitat

Blue-winged teals breed across much of North America, from southern Alaska to Nova Scotia, and south to northern Texas, though they are rare in the desert southwest and west coast. They are the most abundant duck in the mixed-grass prairies of the Dakotas and the prairie provinces of Canada. These dabbling ducks prefer marshes and ponds, particularly those with dense emergent vegetation. They favour shallow water habitats—both inland freshwater marshes and coastal salt-marsh meadows—and typically nest within several hundred yards of open water in grassy sites such as bluegrass meadows, hayfields, and sedge meadows. For winter, they migrate south to the Pacific and Atlantic coasts, the Gulf Coast, Caribbean islands, and Central America, with populations reaching as far south as Brazil and central Chile. They are occasional vagrants to Europe, where their yellow legs distinguish them from similar small duck species.

Behaviour & diet

Blue-winged teals are dabbling ducks that feed in shallow water at the edges of marshes and open water, primarily consuming plants, though their diet may also include molluscs and aquatic insects. They prefer calm water or sluggish currents to fast-flowing water and use rocks, muskrat houses, fallen tree limbs, and mudflats as resting sites. Notably, blue-winged teals are generally the first ducks to migrate south in fall and the last to return north in spring. Adult males depart the breeding grounds well before females and immatures; consequently, most flocks observed after mid-September consist largely of adult females and young birds. During migration, some individuals fly long distances over open ocean.

Best time & places to see it

The breeding season offers the best opportunity to observe blue-winged teals in their northern prairie and parkland habitats, particularly in the Dakotas and Canadian prairie provinces. During migration periods, especially in fall, they can be found in wetlands throughout central North America. Winter observers should focus on coastal marshes, shallow bays, and inland freshwater marshes from the Gulf Coast to the Atlantic Coast and southward. Those near the prairies and parklands may encounter them during their peak breeding months, while travellers to Caribbean or Central American wetlands may encounter wintering populations.

Photography tips

The male's striking facial pattern—the white crescent against the greyish-blue head—is highly photogenic and distinctive. Photographers should focus on capturing this key identifying feature when males are visible. The yellow legs, visible on both sexes, provide good colour contrast in images. Early morning light often reveals the iridescent sheen on the males' heads and the vibrant blue of the wing coverts. During migration, photograph them in flocks to document their social behaviour. Patience in marsh habitats during calm conditions will yield the best shots, as these ducks prefer slower water where they are more easily approached and photographed.