Black-billed whistling ducks are the largest and rarest of the whistling duck species. They are found on islands throughout the Caribbean where their numbers are declining due to hunting, habitat loss and loss of eggs to introduced predators like mongoose and cats.
They generally feed at night on plants and seeds. Sometimes known as tree ducks, they perch well and often make their nests in the fronds of palm trees.
They can be quite belligerent and ours have been known to chase off swans. Birds bred at the nature centre have moved to Birdworld in Surrey.