I got some (very bad photos) of the Black Tern at Kilowatt South this AM around 9:15 AM. I think they show a positive i.d. at least. It was flying back and forth across the river along the N.H. shore and dipping down occasionally. These are i.d. pics only. Hopefully it is still around.
There was also a Common Loon there and a few Mallards.
Many thanks to Chris Rimmer who saw this bird last night and sent out an alert.