Frances & I combined the GBBC and the Rusty Blackbird Blitz 
with a 2-mile trek along the Paint Branch Stream Valley Park 
trail from Cherry Hill Rd to the University of Maryland in 
College Park, PG County.

Highlights included a single dark-morph SNOW GOOSE in the 
big pond by the MD-198 entrance to the golf course, a pair 
of BALD EAGLEs (1 juvenile) harrassed by crows in the ag 
fields, and a FOX SPARROW near the swamp.  The raptor haul 
was very good.  Unfortunately, no Rusty Blackbirds (not many 
blackbirds in general).  Here's the report I submitted to 
eBird:

Location:    Paint Branch Stream Valley Park
Observation date:    2/15/09
Notes:    Combining the GBBC and the Rusty Blackbird Blitz 
in one go.  Sadly, no Rustys (not many blackbirds in 
general).  Highlights included Field & Fox Sparrows, 
bluebirds, lots of raptors, and a Snow Goose.  Sunny, cool, 
breezy.  May have heard Winter Wren (could not locate).
Number of species:    39

Snow Goose    1    dark morph, pretty dingy (juvenile?), 
~25% smaller than the surrounding Canada Geese
Canada Goose    18
Mallard    17
Black Vulture    3
Turkey Vulture    1
Bald Eagle    2    harassed by crows while perching
Cooper's Hawk    2    one about crow size, the other 
noticeably smaller, but not a Sharpie -- male & female?
Red-shouldered Hawk    4    two pairs well separated
Red-tailed Hawk    1
Killdeer    2
Ring-billed Gull    4
Rock Pigeon    1
Belted Kingfisher    1
Red-bellied Woodpecker    4    at least 1 male
Downy Woodpecker    1
Hairy Woodpecker    1
Blue Jay    3
American Crow    15    approx
Fish Crow    5    approx
crow sp.    100    approx
Carolina Chickadee    7
Tufted Titmouse    4
Carolina Wren    16    male & female
Eastern Bluebird    4    male & female
American Robin    2
Northern Mockingbird    5
European Starling    9
Eastern Towhee    1    heard only, and just once
Field Sparrow    4
Fox Sparrow    1
Song Sparrow    11
White-throated Sparrow    19
Dark-eyed Junco    24
Northern Cardinal    13    male & female
Red-winged Blackbird    5    those seen all male
Common Grackle    9
House Finch    14    male & female
American Goldfinch    2
House Sparrow    2

This report was generated automatically by eBird 
v2(http://ebird.org)

P.S. Still getting 1-2 PINE SISKINS at our feeders in Laurel 
on a regular basis.

-- 
Derek C. Richardson, Laurel, PG County, MD
http://www.astro.umd.edu/~dcr/Archives/Photos/birds.html