Black-Bellied Whistling Duck, in Massachusetts

On July 3rd a Black-Bellied Whistling Duck turned up during the evening at Great Meadows NWR in Concord, Massachusetts, and a lucky group of nature walkers got to see it (and a few highly mobile birders).  I missed it, and just when we were chalking it up as a frustratingly casual sighting, it returned, and to the exact spot where it was first seen.

Jason Forbes spotted it early on July 15th and got the word out immediately.  I was camping that weekend, and returned around noon only to read the email and check messages and ditch the family to go see it.  Hundred of birders saw this unbelievably cooperative bird until early evening that day.  Here are a couple shots of this lovely duck.  Where will it wander next?