The Caspian Terns are back on the usual pier near the display ship Barry. I counted 4 this afternoon plus a variety gulls (Laughing, Ring-Billed, Great Black-backed), Double Crested Cormorants, and several Great Blue Herons. There are hundreds of birds that roost on this pier, so there may be other species. I did not have time to inventory the entire group.
 
Public access information for the Washington Navy Yard can be found here:
 
http://www.history.navy.mil/nhc8.htm