Plum Island Newbury MA
Plum Island is a barrier island off the Atlantic coast of Massachusetts, at Newburyport, MA. It includes the Parker River National Wildlife Refuge, home to nearly 800 species of birds.
Plum Island NY
The more "famous" Plum Island (formerly Plumb Island) is off Long Island, NY, and is the location of the Department of Homeland Security's animal disease research facility. It is mentioned in the movie "Silence of the Lambs" (1989) as a secure outdoor government location that is offered to Hannibal Lecter as an inducement to cooperate.