The Pine Warbler seen yesterday as it appears from Cornell Ebird records is the earliest ever for Prospect Park. Unless I find an even earlier record, the earliest PIWA was on March 29, 1968.
http://ebird.org/ebird/view/checklist?subID=S4109949
http://ebird.org/ebird/hotspot/L109516?m=3&yr=all&changeDate=Set
