Decent morning along Sligo Creek Pkwy in Montgomery Co. between Colesville Road and the Beltway. Best flocks were in the sunshine along the edges of the soccer fields; almost no birds in the shade. In addition to the normal resident birds, saw the following:
 
Black and white warbler (2)
Chesnut sided warbler (1)
Blackburnian warbler (1)
Black throated green warbler (2)
Baltimore oriole (3)
Warbling vireo (1)
Green heron (2)
 
Last night, >50 Chimney swifts and 2 Common nighthawks in the area.
 
Noah Kahn
Silver Spring, MD