Clianthus maximus, commonly known as kaka beak (kōwhai ngutu-kākā in Māori), is a woody legume shrub native to New Zealand's North Island. It is one of two species of Clianthus (kaka beak) and both have striking clusters of red flowers which resemble the beak of the kākā, a New Zealand parrot. The species is endangered in the wild, with only 153 trees found in a 2005 survey (down from over 1000 in 1996), in the East Coast and northern Hawkes Bay regions.