June 9, 2015 – Blue Duck, Whio, Mountain Duck, or Blue Mountain Duck (Hymenolaimus malacorhynchos)

Requested by: schmias

These torrent ducks are found near fast-moving rivers in New Zealand. They eat freshwater invertebrates, such as caddis fly larvae. Males have a high-pitched whistling call which sounds like “whi-o” and is the source of their Maori name. They are monogamous and very territorial. Females incubate the eggs while males guard the nest, then both parents guard the ducklings until they fledge and disperse to find their own territories. Threatened by nest predators, such as stoats and rats, Blue Ducks are classified as Endangered by the IUCN.