I participated in a bird walk from about 8:15 - 10:15 on Sat. at the Bacon
Ridge Branch Natural Area, Crownsville, Maryland. Including the
parking/sewage treatment area on the east side of 97, birds seen or heard,
among others,  included:

Orchard Oriole
House Wren(s)
Blue-winged Teal (pair)
Bufflehead (female)
White-eyed Vireo(s)
Northern Parulas
B/W Warbler(s)
Worm-eating Warbler
Hooded Warbler(s)
Ovenbird
B/G Gnatcatcher(s)
Male N. Harrier(s)
Common Loon(s)
R.C. Kinglet(s)