I saw what may have been a Nashville warbler along the bike path in Berwyn Heights this morning (about 11 am). I'm reluctant to call it for sure because I'm not familiar with the bird and I got only a short look at it. White eye ring was very prominent on a gray head. The undersides were yellow; I believe the throat was yellow, but am not absolutely sure of that. I didn't note wing bars, but may have missed them in the brief glimpse I got. I did hear the song several times -- it consisted of 3-4 separate notes at the same tone followed by a 5-note trill. The bird was located in the shrubs at the edge of the woods on the side of the path opposite Lake Artemesia, between the bridges over Indian Creek and Paint Branch, about 50 yards from the Paint Branch bridge. The MOS trip last Saturday located male common yellowthroat, male Northern Parula, and male prothonotary warbler from the Paint Branch bridge. If anyone finds the Nashville warbler, or whatever it really is, please let me know. Other birds found this morning along Indian Creek and around Lake Artemesia included spotted sandpiper solitary sandpiper prothonotary warbler swamp sparrow wood duck red-shouldered hawk red-eyed and white-eyed vireo To get to the Anacostia bike path in Berwyn Heights, park in the Lake Artemesia parking lot and walk East on Berwyn Rd across Indian Creek, then turn South on the bike path. Jack Saba