Had best migration day of the year this morning outside my window: 
Baltimore Oriole, Prairie Warbler, and Blue-headed Vireo (last two were 
yard birds), along with singing kinglets and butterbutts.  Looks like 
some of the later migrants are finally starting to get here (by 
"finally" I don't mean they're late--just that they're arriving later 
than we want them to!).   The oriole is first eBird report of the year 
for Mont. Co.  My yard also had first eBird report last year--though it 
was the 25th last year.  It probably helps to have a window that makes 
me eye-level with the treetops, where these guys seem to prefer hanging out.

Good birding!
Jim Moore
Rockville, Maryland
PLEASE REPORT YOUR BIRD SIGHTINGS to http://ebird.org/