Uncommon migrant in this region. Arrives mid-April, leaves mid-October. Breeding colonies occur on the lower Potomac and Eastern Shore from late May to early August.
The bird on the left is a juvenile female.
Collected By: Mr. Hamilton
Locality: Washington, DC (Carp Ponds)
Sex: Female, Juvenile
Catalog ID: 75367
The bird on the right is an adult male.
Collected By: Wm Palmer
Locality: Cobbs Island, VA
Catalog ID: 153320