I also had two Tree Swallows today on the Patuxent, at Merkle Wildlife Sanctuary. I was as shocked as you were. Is it possible they were the two same individuals? I saw mine around 3:45pm.

Other highlights were a Rusty Blackbird, Merlin, Savannah Sparrows, and Pipits.

Full List:

Location:     Merkle Wildlife Sanctuary
Observation date:     2/11/09
Number of species:     38

Canada Goose     2750
Gadwall     9
American Wigeon     7
American Black Duck     9
Mallard     47
Green-winged Teal (American)     2
Ring-necked Duck     1
Hooded Merganser     2
Common Merganser     62
Black Vulture     1
Turkey Vulture     3
Bald Eagle     1
Northern Harrier     2
Red-tailed Hawk     2
Merlin     1
Killdeer     2
Ring-billed Gull     26
Herring Gull     51
Mourning Dove     9
Northern Flicker     6
Blue Jay     12
Horned Lark     4
Tree Swallow     2    I got some rough video footage.
Carolina Chickadee     2
Tufted Titmouse     2
Carolina Wren     2
Eastern Bluebird     11
American Robin     9
Northern Mockingbird     1
European Starling     15
American Pipit     14
Yellow-rumped Warbler (Myrtle)     1
Eastern Towhee     2
Savannah Sparrow     8
Dark-eyed Junco     6
Northern Cardinal     2
Rusty Blackbird     1
Common Grackle     3000     Observed flying just above the treeline, heading west southwest.


Robert Ostrowski
Bowie, MD