During my morning outing to Upper Watt's Branch, I had a great 10 minute 
stretch where I came across a Wilson's and Mourning Warbler (both well 
seen) and a Bay-breasted (heard only). All 3 birds were along the path 
on the east side of the "blown out" beaver pond. This is the first time 
I heard a Wilson's sing that was not on a tape or CD. I did not 
recognize the song immediately. It sounded like someone had crossed a 
Northern Waterthrush with a House Wren. When I found it with my bare 
eyes and saw yellow, I started thinking Nashville but when I got it in 
the bins, was "pumped" to see the black cap. The Bay-breasted was in the 
high tree tops and sang 5 or 6 times and stopped, making it almost 
impossible to find.

Complete list for 5-11-09 below:

Canada Goose     2
Great Blue Heron     1
Red-shouldered Hawk     1
Red-tailed Hawk     1
Mourning Dove     2
Barred Owl     1 (heard)
Ruby-throated Hummingbird     2
Red-bellied Woodpecker     1
Downy Woodpecker     1
Hairy Woodpecker     2
Northern Flicker     1
Eastern Wood-Pewee     2
Acadian Flycatcher     3
Red-eyed Vireo     4
Blue Jay     8
crow sp.     4
Carolina Chickadee     1
Carolina Wren     2
House Wren     4
Blue-gray Gnatcatcher     2
Veery     1
Swainson's Thrush     1
Wood Thrush     5
American Robin     10
Gray Catbird     11
Northern Mockingbird     1
European Starling     5
Cedar Waxwing     35
Northern Parula     3
Cape May Warbler     1 (heard)
Black-throated Blue Warbler     4
Yellow-rumped Warbler     2
Black-throated Green Warbler     2
Bay-breasted Warbler     1
Blackpoll Warbler     3
American Redstart     2
Ovenbird     4
Mourning Warbler     1
Common Yellowthroat     2
Wilson's Warbler     1
Scarlet Tanager     4
Eastern Towhee     1
Song Sparrow     5
Northern Cardinal     8
Rose-breasted Grosbeak     1
Indigo Bunting     1
Red-winged Blackbird     2
Common Grackle     6
Brown-headed Cowbird     2
Baltimore Oriole     1
American Goldfinch     3
House Sparrow     6

Andy Martin
Gaithersburg