Whistling Ducks belong to another family of Dendrocygnidae, but it is easier to group this whole lot under the family of Anatidae.

Ducks are very common birds in countries which has strong conservation's guidelines. They are easily seen in ponds of public parks and in good numbers too. Here sadly in Malaysia, Ducks are treated like wild fowls. Fair games for collectors. Not surprising that whatever ducks that we have only select very remote spots. There they too keeping high vigilance for approaching human. In real life, they are hardly spotted at all. The best way to get to seeing them would be depending on tip off of their last seen whereabouts. Then at that spot  exercise patient stalking for their appearances

From the long list of the 14. Ducks listed only these few are residents The Lesser Whistling Duck & the Pygmy-cotton Goose.
The rest of the names on the list are rare winter visitors, could be migrants or passage migrants. When spotted, they are usually  alone or visiting in pair