My last chance to bird the park this spring migration season 
(off to France tomorrow!).  Nice weather: cool, sunny, a bit 
breezy.  Lots of birders, and a good diversity of birds, 
particularly at the maintenance yard.  Highlights were good 
looks by many birders at TENNESSEE WARBLER (yard), WILSON'S 
WARBLER (equestrian field and yard), and CANADA WARBLER 
(heard at field, seen at yard)---all first-of-season for me. 
Other warblers observed: NASHVILLE (heard only, stables), 
NORTHERN PARULA (yard), CHESTNUT-SIDED (many around), 
MAGNOLIA (many around), BLACK-THROATED BLUE (a few), 
YELLOW-RUMPED (a few), BLACK-THROATED GREEN (yard), 
BAY-BREASTED (yard, male & female seen; I only saw the 
female), BLACKPOLL (lots around), AMERICAN REDSTART (a few), 
WORM-EATING (forest south of the stables, heard only), 
OVENBIRD (heard only), and COMMON YELLOWTHROAT (yard, dog 
run).  Total: 16 warbler species, plus a possible Cape May 
singing (yard along the fence, probably a Blackpoll -- I 
didn't get a good recording of it nor of another 
unidentified 2-speed triller in the yard).  I also overhead 
someone saying a Yellow-throated Warbler was seen at the 
yard (I couldn't confirm), and Dave may have heard a Yellow 
Warbler at the yard.

Other birds of note: a pair of RED-SHOULDERED HAWKS 
frolicking (mating?), a distant YELLOW-BILLED CUCKOO heard 
at the yard, lots of EASTERN WOOD-PEWEES, several ACADIAN 
FLYCATCHERS, a couple GREAT CRESTED FLYCATCHERS, a 
YELLOW-THROATED VIREO singing in the forest near the 
stables, a VEERY heard near the ridge at dawn, several 
SWAINSON'S THRUSHES, and 2 ROSE-BREASTED GROSBEAKS (1 female 
plus a presumed juvenile male with a yellowish-orange bib).

My eBird summary (60 species, 4h25m):

Canada Goose  			1
Mallard 			5
Red-shouldered Hawk 		2
Mourning Dove 			3
Yellow-billed Cuckoo 		1
Chimney Swift 			4
Ruby-throated Hummingbird 	1
Red-bellied Woodpecker 		4
Downy Woodpecker 		4
Northern Flicker 		1
Pileated Woodpecker 		1
Eastern Wood-Pewee 		7
Acadian Flycatcher 		4
Great Crested Flycatcher 	2
Yellow-throated Vireo 		1
Red-eyed Vireo 			6
Blue Jay 			2
American Crow 			2
Barn Swallow 			1
Carolina Chickadee 		4
Tufted Titmouse 		2
White-breasted Nuthatch 	1
Carolina Wren 			1
House Wren 			1
Blue-gray Gnatcatcher 		8
Veery 				1
Swainson's Thrush 		3
Wood Thrush 			3
American Robin 			2
Gray Catbird 			2
European Starling 		25
Cedar Waxwing 			2
Tennessee Warbler 		1
Nashville Warbler 		1
Northern Parula 		1
Chestnut-sided Warbler 		5
Magnolia Warbler 		4
Black-throated Blue Warbler 	3
Yellow-rumped Warbler 		2
Black-throated Green Warbler 	1
Bay-breasted Warbler 		1
Blackpoll Warbler 		6
American Redstart 		2
Worm-eating Warbler 		1
Ovenbird 			4
Common Yellowthroat 		2
Wilson's Warbler 		2
Canada Warbler 			2
Scarlet Tanager 		2
Eastern Towhee 			2
Chipping Sparrow 		1
Song Sparrow 			5
Northern Cardinal 		5
Rose-breasted Grosbeak 		2
Indigo Bunting 			4
Common Grackle 			1
Brown-headed Cowbird	 	6
Baltimore Oriole 		1
American Goldfinch 		3
House Sparrow 			20

D

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