blue duck

English

Noun

blue duck (plural blue ducks)

1. A species of duck, Hymenolaimus malacorhynchos, native to New Zealand.

   Synonym: whio

   • 2000, Errol Fuller, Extinct Birds, Oxford 2000, p. 83:

     Trout, which have been introduced to New Zealand waterways, may also pose a threat to blue ducks since they almost certainly compete with them for the aquatic insects on which the birds depend.