A DC Birding Blog: Personal observations of birds in the Washington, D.C. area.
Birding in Washington, D.C.: Site guides to 7 of the best birding spots in DC.
Mary Scott's Birding DC: Travelogue of two sites in DC.
Maryland/DC Records Committee: Evaluates records of rare birds. Checklist, review list, sighting documentation guide, reporting forms, and reports.
National Capital Parks-Central: Bird checklist.