The whistling ducks, black-billed and fulvous (ANATIDAE) live in two large enclosures, imitating a small reservoir in a tropical forest.

The black-billed whistling ducks (Dendrocygna arborea) (ANATIDAE) are known from Cuba, Taity and Jamaica where they inhabit back forest bogs and mangrove forests in coastal areas. In the daytime the birds shelter among marsh vegetation or on lower tree brunches, and never swim out to the open water. At night the ducks usually fly to the palm tree plantation to feed. Fruits of royal palm are their favourite food. When flying ducks utter whistling sounds.

Вlack-billed whistling ducks usually breed in summer – since February till October. The nests are normally built in coastal vegetation; the nests on scrubs and in hollow stumps are known also. There are 10-14 spherical white eggs in a clutch and hatching lasts 30-31 days. The fulvous whistling ducks (Dendrocygna bicolor) (ANATIDAE) inhabit tropical and subtropical reservoirs of North and South America, Asia and Africa. In the south of North America and in India they prefer rice fields and bogs, in South America – coastal zones with the trees. Melodious whistle of these ducks gave name to the species.

The reproduction of these ducks frequently depends on a season of rains. The rice fields are the favourite places for nesting. Usually in June – July each female lays 10-15 eggs. Often two or three females lay their eggs in the same nest. There were cases, when more than 50 eggs were found in one nest. Hatching lasts 24-26 days, females and males hatch the clutch in turn.

In the zoo there are about 10 fulvous whistling ducks, and there were some cases of successful breeding.