Howdy and welcome to DC! I often take a bike and the shoelace express to get to my favorite places to bird in dc: Kenilworth Aquatic Gardens, Kingman & Heritage Islands, and Anacostia Park (roller rink/bridge area). I'm on the board of the DC Audubon Society (a local, volunteer-run bird-friendly group) and you can sign up for our newsletter or Eventbrite to first know about events. Hope to see you out there!