The New Zealand Kaka (Nestor meridionalis) is a medium sized parrot endemic to New Zealand. It is closely related to the Kea, but has darker plumage and is more arboreal being commonly found within forested lowlands and coastal areas. The birds are mainly diurnal but are active at night during fine weather or a full moon. Flocks of boisterous kākā gather in the early morning and late evening to socialise, with calls including a harsh ka-aa and a whistling u-wiia. It feeds on fruits, berries, seeds, flowers, buds, nectar and invertebrates.

The Orokonui Ecosanctuary has become the only place on mainland South Island of New Zealand where native birds, animals and insects can live a life safe from predators. An 8.7km pest-proof fence was completed in 2007 that encompasses 307 hectares of native and introduced forest. Animal pests have been almost entirely eradicated to allow reintroductions of endangered native species such as tuatara, kiwi and takahe. Futhermore it is becoming increasingly common for native birds to find their own way into the ecosanctuary and take up residence.