West Indian Whistling Duck Dendrocygna arborea

Sometimes known as Black-billed Whistling Duck (including in the popular Helm Guide to wildfowl by Madge & Burn (1988)) - but not to be confused with Black-bellied Whistling Duck.

I've only seen this species in captivity.

captive West Indian Whistling Ducks, Blakeney Quay collection (Norfolk, UK), 28th February 2009

captive West Indian Whistling Ducks, Blakeney Quay collection (Norfolk, UK), 15th October 2011

captive West Indian Whistling Duck, Blakeney Quay collection (Norfolk, UK), 18th January 2004

captive West Indian Whistling Duck, Blakeney Quay collection (Norfolk, UK), 7th November 2003

captive West Indian Whistling Duck, Blakeney Quay collection (Norfolk, UK), 12th April 2004