Overcast Morning Birding

Despite the threat of rain and overcast skies, my walk with two co-workers to Occoquan Bay NWR turned up 60 species. Highlights were King Rail (heard), 10 Bald Eagles, Prothonotary Warbler (one of 6 species of warbler), and Rusty Blackbirds.
 Complete species list is below:

Canada Goose     8
Wood Duck     6
Gadwall     80
Mallard     5
Ring-necked Duck     2
Lesser Scaup     20
Hooded Merganser     3
Ruddy Duck     50
Wild Turkey     1
Common Loon     2
Pied-billed Grebe     1
Double-crested Cormorant     10
Great Blue Heron     20
Black Vulture     1
Turkey Vulture     5
Osprey     15
Bald Eagle     10
Cooper's Hawk     1
Accipiter sp.     1
King Rail     X
American Coot     200
Solitary Sandpiper     1
Greater/Lesser Yellowlegs     1
Caspian Tern     12
Mourning Dove     3
Chimney Swift     6
Belted Kingfisher     1
Red-bellied Woodpecker     5
Downy Woodpecker     2
Northern Flicker (Yellow-shafted)     1
Eastern Kingbird     1
Blue Jay     3
American Crow     5
Fish Crow     2
Purple Martin     6
Tree Swallow     10
Barn Swallow     3
Tufted Titmouse     3
Winter Wren     1
Blue-gray Gnatcatcher     8
Eastern Bluebird     2
American Robin     5
Northern Mockingbird     2
Brown Thrasher     1
European Starling     3
Yellow Warbler     12
Yellow-rumped Warbler (Myrtle)     4
Prairie Warbler     2
Palm Warbler     1
Prothonotary Warbler     1
Common Yellowthroat     5
Eastern Towhee     3
Field Sparrow     2
Song Sparrow     2
Swamp Sparrow     3
White-throated Sparrow     15
Northern Cardinal     5
Red-winged Blackbird     40
Rusty Blackbird     5
Common Grackle     18
Brown-headed Cowbird     6
American Goldfinch     10