I tried walking one of the northern trails (the "yellow" trail) at North Tract and found good numbers and variety of warblers. The highlight was a single male Kentucky warbler. He did not sing but he was chipping incessantly, I watched him for some time and he didn't approach any juveniles. Other warblers included Worm Eating (on Wild Turkey Way), Redstart, Hooded (quite a few) Ovenbird (quite a few) and Pine. There was also a female Scarlet Tanager  and an adult and 2 juvenil Wood Thruses along Kingfisher Way.

Chris Barnard
Rockville, MD