With winds light and out of south last night/early morning, I put my 
microphone out from 11:30 pm to 6 am to check for nocturnal flight 
calls. Pretty sparse but did get a couple Ring-billed Gulls, a Tundra 
Swan, a Killdeer and 3 possible Song Sparrows.  Also picked up a strange 
fast twitter which I posted at
http://nightmigrants.com/_mgxroot/page_10824.html
Have no idea what it might be.  Maybe some local resident disturbed off 
the roost.

Out of curiosity, I also recorded on the nights of Feb 15 and 21 but 
(and not surprisingly) picked up no avian calls only planes, trains, and 
automobiles.

Andy Martin
Gaithersburg