The kākāpō (night parrot) is one of New Zealand's unique 'treasures' and with only 126 known surviving birds - including 11 new chicks born in 2011 - it is listed internationally as a critically endangered species. Large, flightless and nocturnal, the kākāpō is an eccentric parrot which can live for decades. It is not closely related to other parrots and, in fact, has a combination of biological features not shared by any other species. It is the only representative of a unique sub-family, Strigops habroptilus, and the softness of its plumage is represented in the second part of that scientific name. With mottled moss-green feathers, camouflage is the bird's main form of defence.