I had 11 warbler species this morning, including a Blackburnian walking on the ground where it had been chased by a redstart, and the interesting combo on one particular branch of Nashville, Tennessee. Others mentioned Canada and orange-crowned but I did not see these. Many rough-winged swallows, first willow flycatcher (for me this year), sparrows acting strangely, each of white-crowned, white-throated, Lincoln's and swamp were in the tops of small trees. Lots of gnats.