After visiting Rock Creek Park this morning (9/20, see Wallace's post),
I went over to Chain Bridge in hopes of seeing a raven.  This is my 3rd
weekend trying, and my 3rd failure.  But it's always an interesting
raptor show, even without seeing a raven.  Today I saw 1 RED-TAILED
HAWK, 1 RED-SHOULDERED HAWK, 1 COOPER'S HAWK, 1-2 OSPREY, and 1
PEREGRINE FALCON.  The falcon spent much of the time harrassing other
birds - mostly TURKEY & BLACK VULTURES, but also the Red-shoulder.  In
previous visits this month I've seen Bald Eagle, Sharp-shinned Hawk and
American Kestrel.

Also noteworthy was a PHILADELPHIA VIREO in the trees next to the
intersection of Clara Barton Pkwy & Chain Bridge.

Good birding,
Paul Pisano
Arlington, VA