Last night was one of the best flights I have ever had in Harford County or anywhere else for that matter.  Kim Caughey and I began listening at 11pm and we remained outside until after 1am.  Mike Burchett joined us at midnight.  Unfortunately, I did not take detailed notes on numbers like the other night, so most are estimates.  The night began like many other late May flights with loads of Swainson's and Gray-cheeked Thrushes along with presumed Blackpoll Warblers (most likely zeep-note warbler).  Spotted Sandpipers were also quite common.  It got more interesting though when a large group of Dunlin began passing over.  Mixed in were Least Sandpipers, atleast 2 Whimbrel, and unidentified shorebirds.  About 10 minutes later, another group of Dunlin began passing with many Short-billed Dowitchers mixed in.  Three Black-bellied Plovers whistled overhead as well.  After another 5 minutes, a third group of Dunlin passes, this group contained another 2-3 Whimbrel (that is how many distinct calls I heard, I have no idea how many birds it represents).  At the same time as this group, a flock of Semi Plovers began passing over as well, but did not seem associated with the Dunlin group.  After Mike arrived, we another group of 2-3 Whimbrel, but the only other shorebirds were Spotted and Least.  A few distinct Bicknell's Thrushes were heard throughout the night.  Scarlet Tanagers seemed more common than they should have been given how many are on territory.  A late American Bittern was the last unexpected bird before we turned in.  
 
Most numbers are estimates
 
American Bittern -1 
Black-bellied Plover- 3
Semipalmated Plover - 10
Whimbrel - 6-8
Spotted Sandpiper - 25
Least Sandpiper - 15
Dunlin - 100+
Short-billed Dowitcher - 25
Yellow-billed Cuckoo - 7 
Black-billed Cuckoo - 1
Veery - 5
Swainson's Thrush - 300+
Gray-cheeked Thrush - 75+
Bicknell's Thrush - 8
Thrush-like notes - 30
Zeep notes (likely Blackpolls) - 35
Other warbler-like notes - 20
Scarlet Tanager - 35
Rose-breasted Grosbeak - 10
 
 
Matt Hafner
Bel Air, MD