Little spotted kiwi

The little spotted kiwi (Apteryx owenii), also known as little grey kiwi or kiwi pukupuku, is a small flightless bird in the kiwi family, Apterygidae. It is the smallest of the five kiwi species, at about 0.9 to 1.9 kg (2–4+1⁄4 lb), about the size of a bantam. It is endemic to New Zealand, and in pre-European times occurred in both main islands, but is now mainly restricted to a number of small offshore islands and mainland reserves protected by pest-exclusion fences.

The little spotted kiwi was on the brink of extinction when a conservation effort took place 100 years ago. Five individuals were translocated from the South Island to Kapiti Island. Today, the Kapiti Island population has grown, with around 1200 birds. They were considered extinct on the mainland, with no sightings since 1978, until their rediscovery in the wild in 2025.

The little spotted kiwi is a ratite and belongs to the Apterygiformes order, and the Apterygidae family. The genus name Apteryx means 'without wings' and the species is named owenii after Sir Richard Owen. Only the nominate subspecies A. o. owenii survives.

The little spotted kiwi was first described in 1847 by John Gould from a specimen obtained by Frederick Strange and sent to England. The locality is not recorded but it probably came from Nelson or Marlborough. In 1873, Henry Potts published an account of its habitats, and about this time specimens were collected in South Westland and sent to England. A specimen described as Apteryx occidentalis in 1893 is often considered a junior synonym of this species, but a study in 2002 indicated this may be a hybrid between Apteryx australis and Apteryx owenii.

These is a subspecies called Apteryx owenii iredalei, from the North Island, but its status as a subspecies is not universally accepted as valid. More commonly known as the North Island little spotted kiwi, it is an extinct subspecies of the little spotted kiwi that was native to the North Island, New Zealand. It was described by Gregory Mathews in 1935. Most subsequent authors do not recognise it or any other subspecies of Apteryx owenii. The North Island little spotted kiwi went extinct sometime in the late 19th century for unknown reasons; most likely from introduced invasive species such as stoats, feral cats, and other related species, or from human activity in the region. Two specimens were collected in the 1880s, being the only known remnants left.

The little spotted kiwi has a length of 35 to 45 cm (14–18 in) and the weight of the male is 0.88 to 1.36 kg (1 lb 15 oz – 3 lb 0 oz) and the female weighs 1 to 1.95 kg (2+1⁄4–4+1⁄4 lb), making it the smallest species of kiwi. Their feathers are pale-mottled grey, with fine white mottling, and are shaggy looking.^{[full citation needed]} They lack aftershafts and barbules. They have large vibrissae feathers around the gape. They lack a tail, but have a small pygostyle. Their bill is ivory-coloured and long and their legs are pale.

The little spotted kiwi had an obligate louse that parasitised on it, Rallicola pilgrimi. In an example of conservation-induced extinction, all lice were killed when the kiwi were translocated to Kapiti Island.

Studies on Kapiti Island show that they prefer flax, seral, and older forest habitats. Lower numbers are found in rough grassland and scrub, indicating that either they prefer other habitats or they simply need a larger territory to support themselves in these areas.