Just past 1:00pm this afternoon, I was walking along the edge of an 
extend piece of our yard that looks down into a shallow wooded, bubbling 
stream gully ... casually paying attention to all those voices that 
inevitably turn out to be Redstarts.  A bird of larger wing flew out of 
the thin understory of tall maples and oaks on the opposite side of the 
gully, triggered the voice in my head who said "Oh, there's our 
Sharp-shinned.  But just as instantly, as the bird flew diagonally 
across in front of me, below my eye level so I could see it well from 
above, it was clear from that vantage that it was no Sharpy but a 
graceful, pointy-winged denizen with brilliant white wing-patches 
flashing in the shade, long-tailed, neckless Common Nighthawk ....... 
glide, three deep strokes, glide, aerobatic turn to the right, disappear 
behind an Oak .......

Ian