Aythya americana
Redhead specimens on display in the exhibit "Birds of D.C."

DC Information

A common migrant and wintering species, found in large flocks in bays and salt-marsh ponds, usually from October to May. Sexes are different.

Specimen Information

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
Sex: Female
Catalog ID: 295972
The duck on the right, standing on land, is a male.
Date: 4/8/1883
Collected By: Frank Ford
Locality: Washington, DC
Sex: Male
Catalog ID: 90014