Princeton, post-deluge, May 1st

South-east winds are not outstanding for migrants but I suspected that the morning's storm front would dump some migrants locally.  There were quite a few warblers in Princeton Institute Woods, most of which were Yellow-rumped.  Unfortunately the low light and gray skies made for some difficult tree-top birding.  As with Central Park the previous weekend, lots of migrants were heard and not seen in 30 minutes birding before work.  The biggest one to get away was a Yellow-throated Vireo that I could follow through the canopy by ear but could not get on it before it left the scene.  House Wrens were also putting in a strong showing - perhaps migrants had swelled the numbers of birds already attempting to hold territory and I heard my first Wood Thrush of the year (not pursued in the very wet woods)

Yellow-throated Vireo
House Wren
Blue-gray Gnatcatcher
Ruby-crowned Kinglet
Wood Thrush
Ovenbird
Black-and-white Warbler
Common Yellowthroat
American Redstart  (first of year)
Northern Parula
Yellow-rumped Warbler  (many)
Eastern Towhee 

Possible heard-only: Blackburnian Warbler