Fort Wayne's Children's Zoo, Radjah Shelduck

From Austrailia.  According to the signage, these ducks spend the day roosting quietly at water's edge, but if an intruder happens along it will get rather noisy, as the ducks will flap their wings and loudly squawk.  They apparently move slowly, making good targets for illegal hunting and therefore their survival is threatened.  They eat snails, worms and large insects.