samson said:
WHy black bellied I wonder ? You would think orange billed would be more appropriate !
Fair question. Hunters need to be able to identify the different species of ducks in flight and at distance. Some are
protected and therefore illegal to shoot. That includes the Canvasback in many parts of the country last season. Others have a limit of 1/day such as the pintail and hen mallard. There is a great risk of killing one that shouldn't be shot if you can't identify the bird correctly in the air at some distance.
The black bellied whistler get's its name from the very obvious and distinct belly patch of black that can be seen from 100s of yards away whereas the color of the bill and feet are not discernable at that distance to someone with average vision.
This is another species of Whistling Duck. See how easy it would be to tell the two species apart in the air quite away off?
http://www.birds.cornell.edu/AllAboutBirds/BirdGuide/Fulvous_Whistling-Duck_dtl.html