A common migrant and wintering species, found in large flocks in bays and salt-marsh ponds, usually from October to May. Sexes are different.
The duck on the left, on the water, is a female.
Date: No date in the record
Collected By: Wm Palmer
Locality: Potomac River, near DC
Catalog ID: 295972
The duck on the right, standing on land, is a male.
Collected By: Frank Ford
Locality: Washington, DC
Catalog ID: 90014