It was nice to find a Pine Warbler among the Yellow-rumps this afternoon 
just past the Riley's Lock bridge.  Also  saw 6 Double-crested 
Cormorants flying up river along with a Greater Black-backed Gull.  With 
water temps in the 40s and air temp high 70s it was probably the worst 
shimmer I have ever seen looking through a scope.

Also, according to today's Gaithersburg Gazette, the resident Mute Swan 
at Lake Whetstone was run over by a car last Friday. You can read about 
it at  http://www.gazette.net/stories/031407/gaitnew212835_32322.shtml.

With winds blowing out of the south the last few nights, I put out the 
recording gear. 3 flocks of Tundra Swans past overhead the night of 
12th/13th along with another Killdeer.  Ring-billed Gulls continue to 
pass overhead at night.  Wish I could see 'em to know which way they are 
going.  I've observed a few flocks of RBGUs heading SW the past few 
afternoons, which is their normal winter pattern.  Song Sparrows are on 
the move.  Recorded about 8 calls on 12th/13th and about 40 calls last 
night.  Maybe a few Fox Sparrow calls mixed in but they were weak and 
not definitive.

Good birding,

Andy Martin 
Gaithersburg, Mont Co