A common migrant, October to December and February to May, and an occasional winter resident. Seen here more often in fresh water than the other bay ducks. Sexes are different.
The duck on the left is a female.
Collected By: Edward J Brown
Locality: Potomac Flats, DC
Catalog ID: 234253
The duck on the right is a male.
Collected By: Wm H Ball
Locality: Patuxent River (Benedict, MD)
Catalog ID: 307841