Crafty Amanda, one of my followers and a friend, took this challenge and had it solved within just a few moments of the last post. This bird is called a Black Bellied Whistling Duck or Dendrocygna Autumnalis. You can read more about this amazing bird on Wikipedia.
Thanks Crafty Amanda for finding this for us and the readers. I am even more thrilled that I caught such a great shot, and that I got to hear it's waa-chooo call!