Broad-billed parrot sketch actually shows that the wings are not particularly short. They appear broad, as they commonly are in forest-adapted species, and the alula appears large, a feature of slow-flying birds. Its sternal keel was reduced, but not enough to prevent flight, as the adept flying "Cyanoramphus" parrots also have reduced keels, and even the flightless kakapo, with its vestigial keel, is capable of gliding. Furthermore, Hoffman's account states that it could fly, albeit with difficulty, and the first published illustration shows the bird on top of a tree, an improbable position for a flightless bird. The broad-billed parrot may have
Geography of New Zealand isolation, and this has resulted in a dynamic evolutionary ecology with examples of very distinctive plants and animals as well as populations of widespread species. Evergreens such as the giant kauri and southern beech dominate the forests. It also has a diverse range of birds, several of which are flightless such as the kiwi (a national icon), the kakapo, the takahē and the weka, and several species of penguins. Around 30 bird species are currently listed as endangered or critically endangered. Conservationists recognised that threatened bird populations could be saved on offshore islands, where, once predators were exterminated, bird life