Tui De Roy / North Island Brown Kiwi (Apteryx australis mantelli) in nocturnal kiwi house, Orana Wildlife Park, Christchurch, New Zealand

Tui De Roy / Stewart Island Brown Kiwi or Southern Tokoeka (Apteryx australis lawryi), female probing by scent for sand hoppers in rotting kelp beach wrack at night, Ocean Beach, Stewart Island, New Zealand

Tui De Roy / Okarito Brown Kiwi (Apteryx rowi) feather detail resembling mammalian hair. Okarito Forest, Westland, South Island, New Zealand.

Tui De Roy / Haast Tokoeka (Apterix australis) with Phil Tisch and Tansy Bliss, Department of Conservation Kiwi Recovery team affixing radio trnasmitter. Haast Kiwi Sanctuary, Westland, South Island, New Zealand.

Mark Carwardine / Domestic dog wearing muzzle, trained to track the endangered North Island Kiwi, Trounson Kauri Park, North Island, New Zealand, January 2009

Tui De Roy / Great Spotted Kiwi (Apteryx haastii) male in rainforest habitat, Kiwi House, Otorohanga Breeding Facility, New Zealand

Tui De Roy / Great Spotted Kiwi (Apteryx haastii) male in rainforest habitat, Kiwi House, Otorohanga Breeding Facility, New Zealand

Tui De Roy / Great Spotted Kiwi (Apteryx haastii) breeding pair showing size difference, female 30% larger, Kiwi House, Otorohanga Breeding Facility, New Zealand

Mark Jones / North Island Brown Kiwi (Apteryx australis mantelli) parent with egg,/nOtorohanga Breeding Facility, New Zealand

Heather Angel / Chinese gooseberry (Actinidia chinensis) fruit, partially eaten by squirrel. Larger seeds than cultivated kiwi bred from the wild species. Tangjiahe National Nature Rerserve, Sichuan Province, China.

Julian Hume / Illustration of extinct birds : Kiwi shovel-billed finch (Vangulifer mirandus) chasing after a Geometrid moth (Scotorythra euryphaea) in dense forest on Maui, while a female looks on. Hawaii.

Christophe Courteau / Kiwi fruit with organic labels, a commercial crop in several countries, such as Italy, New Zealand, Chile, Greece and France.