Birds of Maryland, Delaware, and the District of Columbia
Beehler, Bruce M., photography by Middleton Evans
Observations of Marine Birds and Mammals in the Northern Chesapeake Bight
Rowlett, Richard A.
Mid-Atlantic Birds Backyard Guide: Bird Watchers Digest Backyard Guides
Bill Thompson III
Birds of Delaware
Hess, Gene; West, Richard L.; Fleming, Lorraine M.; Barhill, Maurice V.
Checklist of Birds of the Mid-Atlantic Area
STOTT, William R. Jr.; Fleming, Gregory W.