What a difference a day makes.  On Saturday morning, I walked from the 
Monocacy Aqueduct to Noland's Ferry and back in Frederick County.  The 
birding was very slow.  I saw exactly 2 warblers, one of which a vibrant 
Yellow-throated Warbler at Noland's Ferry.  This was the latest I had ever 
seen one.

On Sunday, I drove down to Taylors Island in Dorchester County and spent
the entire morning birding along Bay Shore Rd, Hoopers Neck Rd, and Pine 
Top Rd.  I found warblers at nearly every stop, but I ended up with better 
numbers than variety.  

Northern Parula--6 (close-out)
Magnolia--10
Black-throated Blue--1
Black-throated Green--4
Blackburnian--1
Palm--2 (1 yellow, 1 western)
Black-and-white--10
American Redstart--20
Ovenbird--1
Common Yellowthroat--6

I probably missed another 30-40 flying overhead in the first hour.

Other birds in the area included:
Red-shouldered Hawk--1
Merlin--1
Red-headed Woodpecker--3
Veery--1
Swainson's Thrush--2
Rose-breasted Grosbeak--1

John Hubbell
Washington DC