Genus Hymenolaimus

Blue Duck - This 54 cm long species is an endemic resident breeder in New Zealand, nesting in hollow logs, small caves and other sheltered spots. It is a rare duck, holding territories on fast flowing mountain rivers.It is a powerful swimmer even in strong currents, but is reluctant to fly. It is difficult to find, but not particularly wary when located.

Order : Anseriformes
Family : Anatidae
Genus : Hymenolaimus