Black stilt
The black stilt (Himantopus novaezelandiae) or kakī (Māori) is a wading bird found in New Zealand. It is one of the world's rarest birds, with 169 adults surviving in the wild as of May 2020. Adult kakī have distinctive black plumage, long pink legs, and a long thin black bill. Black stilts largely breed in the Mackenzie Basin in the South Island, and are threatened by introduced feral cats, ferrets, and hedgehogs as well as habitat degradation from hydroelectric dams, agriculture, and invasive weeds. Taxonomy and systematics Black stilts are one of several species in the genus Himantopus, classified along with avocets in the family Recurvirostridae. Although genetically and behaviourally distinct from pied stilts (Himantopus himantopus), they are able to successfully hybridise with them. Hybridisation and dilution of the gene pool is one reason black stilts are threatened with extinction. Black and pied stilts in New Zealand represent two colonisations of pied stilt ancestors from Australia: the first, long ago, giving rise to melanistic descendants, the second in the early 19th century. Description Black stilts are a medium-sized (220 g) wader with extremely long pink legs, red eyes, distinctively black plumage, and a long slender black bill. Juveniles have a