Spent about an hour at Violette's Lock between 1 and 2 pm today.  Upon 
getting out of the car, a Mourning Warbler was calling from woods next 
to parking lot.  Never saw it unfortunately.  I was able to get about 10 
feet from the sound and it just clammed up.  Waited another 15-20 
minutes but never heard it again.  Frustrating.

Also, out on the river, about 200 yds north of rapids and about 20 yds 
off the VA shore, a single tern (either a Common or Forester's) was 
perched on a stick up.  Even at 60X it was just to far for me to id to 
species level.

Only other bird of note was a Common Nighthawk flying above parking lot 
area.

Andy Martin
Gaithersburg