A pair of bald eagles were seen on November 19, 2012 in the northwest cove of Canobie Lake.  Ed Jacobs took a picture of one perching in a tree near his dock: Director Deb Tipton took these three photos from her house:

We understand they were seen again on the lake, a couple of times after the 19th.  They were diving, presumably fishing, in the main part of the lake not far from the park.