Whistling ducks, otherwise known as tree ducks, are not really tree ducks at all. They do not perch a great deal and only rarely nest in tree holes. The name whistling duck is far more appropriate and descriptive, as all species in the tribe use a unique whistle, varying from high-pitched shrills to clear or squeaky whistles.
BLACK-BELLIED WHISTLING DUCK (Dendrocygna autumnalis)
FULVOUS WHISTLING DUCK (Dendrocygna bicolor)
WHITE FACED WHISTLING DUCK (Dendrocygna viduata)
All photos taken at London WWT – November 2016 and May 2017