I believe I saw a Peregrine Falcon being mobbed by crows at 3 pm on Wednesday, Oct. 28th. It was being chased west on the north side of Constitution Avenue between 12th & 14th streets, dodging under arches to escape the crows. Not having my binoculars, I did not get a close look but the color and flight seemed right for a Peregrine. Does anyone know of any resident in that area, across from the museums of Natural History and American History? Dex Hinckley 703-354-1342