Did some birding this morning in Montgomery County from Violette's Lock 
west, along the river. Best bird was a Yellow-throated Warbler heard and 
then seen near the Violette's Lock parking lot at dawn. I also had a 
White-crowned Sparrow near the Polo grounds, and three Caspian Terns in 
a cornfield (!) along River Road just west of Edwards Ferry. The terns 
were mixed in with a large flock of Bonaparte's and Ring-billed Gulls. 
Full list below.

Location:     C&O Canal--Violette's Lock (unless otherwise noted)
Observation date:     4/5/09
Number of species:     57

Canada Goose     X
Wood Duck     6
Mallard     X
Blue-winged Teal     4
Green-winged Teal     2
Bufflehead     X
Ring-necked Duck 6 (Hughes Hollow)
Common Merganser     X
Red-breasted Merganser     X
Pied-billed Grebe     6
Horned Grebe     5 (some in breeding plumage)
Double-crested Cormorant     X
Great Blue Heron     4
Turkey Vulture     X
Black Vulture    X (Hughes Hollow)
Bald Eagle     1
Red-shouldered Hawk X (Hughes Hollow)
American Kestrel  2  (West of Edwards Ferry)
American Coot  8 (Hughes Hollow)
Bonaparte's Gull     50
Ring-billed Gull     X
Caspian Tern    3 (West of Edwards Ferry)
Mourning Dove     X
Belted Kingfisher     X
Red-bellied Woodpecker     X
Downy Woodpecker (Sycamore Landing)
Northern Flicker     1
Pileated Woodpecker     3
Eastern Phoebe     3
Blue Jay     X
American Crow     X
Fish Crow     X
Tree Swallow     X
Carolina Chickadee     X
Tufted Titmouse     X
White-breasted Nuthatch     X
Carolina Wren     X
Ruby-crowned Kinglet     2
Northern Mockingbird  X  (Polo grounds on Hughes Road)
Horned Lark   3   (Polo grounds on Hughes Road)
Eastern Bluebird     1
American Robin     X
Catharus thrush Sp. (heard only and only once--I think Swainson's or Hermit)
European Starling     X
Yellow-rumped Warbler     6
Yellow-throated Warbler     1
Eastern Towhee     X
Song Sparrow     X
Swamp Sparrow     1
Field Sparrow  X  (Polo grounds on Hughes Road)
White-throated Sparrow     X
White-crowned Sparrow 1  (Polo grounds on Hughes Road)
Dark-eyed Junco     X
Northern Cardinal     X
Brown-headed Cowbird     X
Red-winged Blackbird X (Hughes Hollow)
American Goldfinch     X

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

Jim Moore
Rockville, Maryland
epiphenomenon AT earthlink DOT net