Gadwall are about the same size as Mallards. Gadwall have a fairly large, square head with a steep forehead. The bill is noticeably thinner than a Mallard's. In flight, the neck is slightly thinner and the wings slightly more slender than a Mallard’s.
Slightly smaller than a Mallard; larger than a Green-winged Teal.between crow and goose
- Both Sexes
- Length: 18.1-22.4 in (46-57 cm)
- Weight: 17.6-44.1 oz (500-1250 g)
- Wingspan: 33.1 in (84 cm)