This was posted today on the Delaware listserve.

Kurt Schwarz
HowCo
goawaybird at comcast dot net

Nick Pulcinella from Pennsylvania just called me and told me that Devich
Farbotnich, another excellent PA birder, just called him and reported that 
they
have a White-winged Tern at the North Pont at Ted Harvey WMA.

Frank Rohrbacher
Wilmington, DE 19810