Saturday(6-30) I came out to McKee-Beshers WMA in Montgomery Co to look 
for nesting Blue Grosbeaks (no luck) and found the first sign of fall- the 
gathering of pre-migratory Northern Rough-winged Swallows on the wiresalong 
River Road.  Although they nest in the general area they don't nest at 
McKee-Beshers(no habitat).  Rough-wings are a MIMO species- the migrate 
before they molt which accounts in part for their early departure.
      Driving in I found 10 on the wires and another one when I walked along 
River Road looking for the grosbeaks.  When I left there were 53.   One of 
the interesting things I have found over the years is that they seem to 
congregate at certain areas,avoiding other seemly similar areas.  Today they 
were about 1/2 way between the intersection of River & Hunting Quarter Rd 
and River and Hughes Rd.

Paul Woodward
Fairfax City, VA