What musical comedy duo is one half of the actor who voices Nigel, the cockatoo from Rio?
Rio (2011 film):  It tells the story of Blu (Eisenberg), a male Spix's macaw who is taken to Rio de Janeiro to mate with a free-spirited female Spix's macaw, Jewel (Hathaway). Jemaine Clement: Jemaine Clement (born 10 January 1974) is a New Zealand comedian, actor, voice actor, singer, writer, director, and multi-instrumentalist, best known as one half of the musical comedy duo Flight of the Conchords along with Bret McKenzie.
Flight of the Conchords