A beautiful clear morning at Rock Creek Park with a nice warbler  
fallout.  The highlight of the day was a MOURNING WARBLER spotted by  
Paul Pisano and later acquired by others.  There was also a YELLOW- 
THROATED WARBLER reported by David Gersten---quite unusual for the  
Park.  We were also greeted by a wonderful courting display of the  
Ruby-throated Hummingbird as it swung back and forth over a wide arc.   
Other highlights:

Northern Parula     4
Yellow Warbler
Chestnut-sided Warbler     10
Magnolia Warbler     13
Black-throated Blue Warbler     4
Yellow-rumped Warbler     4
Black-throated Green Warbler
Blackburnian Warbler     2
Yellow-throated Warbler
Bay-breasted Warbler
Blackpoll Warbler     6
Black-and-white Warbler     (heard)
American Redstart     10
Worm-eating Warbler     (heard)
Ovenbird     (heard)
Mourning Warbler       (Paul)
Common Yellowthroat     5
Canada Warbler     4

Ruby-throated Hummingbird     2
Red-eyed Vireo     20+
Yellow-billed Cuckoo     2-3 (Dave B.)
Yellow-throated Vireo     (Gail)
Gray-cheeked Thrush     (Gail)
Veery     (Sally)
Swainson's Thrush     12+
Wood Thrush    (heard)
Great Crested Flycatcher     2
Lincoln's Sparrow (Jim and Barry)
Plus usual

Observers:  Mike Bowen, Dave Bolton, Barry Cooper, Gail Mackiernan,  
Dave Gersten, Jim Lemert, Marjorie Rachlin, Sally Wechsle, Dave,  
Kathryn, Sheila, Wallace, ++

Have Fun Birding!

Wallace Kornack
Washington DC