Why Philadelphia over Warbling Vireo?
-The yellow wash on the belly was more obvious in person than in these photos
-The white eyebrow had more contrast in person than in these photos
-The cap is darker and contrasts with the nape
-The back was olive-green - another trait hard to see in the photos
-Notice the contrast between the back and the wings
-The habitat was more typical for eastern Philly Vireos than for Warbling - a tree over water in a fairly open habitat