There were good numbers and variety of warblers at the Rock Creek Park 
Maintenance Yard from 6:30 – 8:00 this morning:

worm-eating warbler
black-throated blue warbler
blue-winged warbler
tennessee warbler
black-and-white warbler (3)
american redstart (4)
common yellowthroat
canada warbler
yellow warbler
magnolia warbler (2)
blackpoll warbler (2)

Also observed:

red-breasted nuthatch 
baltimore oriole (3)
acadian flycatcher 
swainson's thrush 
red-eyed Vireo (4+)
blue-gray gnatcatcher (2)
rose-breasted grosbeak
towhees, catbirds, robins, white-breasted nuthatches, cardinals, chickadees, 
titmice, red-bellied woodpeckers, bluejays, swifts.

____ 
David Gersten
Silver Spring, MD