A lot of activity at North Tract this morning. A total of 11 species of warblers including Kentucky, Canada, Blackburnian (reported by another birder), Yellow Throated, Black Throated Blue (many), Redstart (many), Black and white, Chats (a couple doing their flight display), Hooded and Yellowthroat. Other birds included Blue Grosbeak, Orchard and Baltimore Orioles and Scarlet Tanager. 

North Tract was a reliable site for nesting Kentucky warblers 2 years ago, I'll check again in a couple of weeks to see if the bird is still there. It was seen on the river trail by the first boardwalk.

Chris Barnard
Rockville, MD