Little Spotted Kiwi
Apteryx owenii
New Zealand’s smallest kiwi species. Light grayish brown with white horizontal banding or “spotting” along the length of the body. Restricted to offshore predator-free island sanctuaries and to the mainland Zealandia sanctuary in Wellington. More often heard than seen, including loud sniffling as it forages for invertebrates. Male produces a series of burry, rising high-pitched whistles. Female has a lower ascending burry whistle. Both sexes repeat their call many times, often duetting. Could be confused with Weka by voice and shape; look for the kiwi’s much longer bill and lack of tail, and listen for its multisyllabic call.
Identification
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 and long and their legs are pale.
Taxonomy
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 subspecies A. o. iredalei from the North Island became extinct in the late 19th century; its status as a subspecies is not universally accepted as valid though.<p>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.
- Scientific name
- Apteryx owenii
- Authority
- Gould, 1847
- Order
- Apterygiformes
- Family
- Apterygidae
- Genus
- Apteryx
Range and habitat
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.
- Migration
- Resident species
Behavior
Little spotted kiwis eat grubs and other small insects that are found underground, and occasionally eat berries. Earthworms, cockchafer beetle larvae, caterpillars, cranefly larvae, and spiders are their most common foods. Fruit of the hinau tree is also commonly consumed. Annelids make up the largest percentage of the bird's diet. Using its sharp talons and long beak, it digs into the ground and then shoves its long beak down the softened ground. As they cannot fly to get to insects or food on trees and their eyesight is very poor, they depend on a keen sense of smell, long beak and talons. They are nocturnal. Little spotted kiwi call occasionally each night to advertise territory and to maintain contact with partners. Often pairs will duet. They are very territorial, and fight conspecifics with their sharp claws, resulting in many feathers on the ground.<p>They nest in an excavated burrow, dug by both birds and sometimes lined with plant material. Eggs are laid from July to January. The clutch size is one to two eggs (15% have 2), which are incubated by the male for 63–76 days. Chicks stay in the nest for 2–3 weeks after hatching and require feeding for 4 weeks. Little spotted kiwi eggs are the largest egg relative to the size of the bird. Its egg accounts for 26 percent of its own weight—the equivalent of a human giving birth to a six-year-old child.
Conservation
At the time it was described, the species was common on the western side of the South Island and in Marlborough. Then a regular trade in skins sprang up and large numbers were collected for European museums. Further, with the advance of European settlement, birds were killed by prospectors and others for food and their attendant dogs and cats took their toll. The species was extinct on the North Island by 1938 when the last four South Island birds were moved from d'Urville Island to the population that had been established on Kapiti Island. After they were released on Kapiti Island, they were also moved to Red Mercury Island, Hen Island, Tiritiri Matangi Island, Chalky Island, and Long Island in the Queen Charlotte Sound. In 2000, about 20 little spotted kiwis were released into Karori Wildlife Sanctuary. This was the first time since the 19th century that little spotted kiwis could be found on the mainland of the North Island. In 2015, 20 kiwis were translocated from Kapiti Island to Anchor Island.<p>As the smallest species of kiwi, the little spotted kiwi would be very vulnerable to the main kiwi predators like cats, dogs, and stoats, however it is now restricted to several off-shore island reserves (mainly Kapiti Island) which are mostly free of introduced predators. The little spotted kiwi's conservation status is listed as "range restricted" (by 'Save the Kiwi'), with a growing population. Formerly classified as "vulnerable" by the IUCN, it was suspected to be more numerous than generally assumed. Following the evaluation of its population size, this was found to be correct, and it was consequently downlisted to "near threatened" status in 2008 as, although not rare, its small range puts it at risk. The lack of predators, apart from weka (Gallirallus australis), is important to its increasing numbers. It has an occurrence range of 31 km2 (12 sq mi), and a population of 1600 was estimated in the year 2012.
- Population trend
- rising
Photos
Distribution
Bird Calls
Other Birds
Black-billed Wood-Dove
Turtur abyssinicus
A small, pale dove with an all-black bill and purple iridescent spots on the wing. Most colorful in flight, when rufous wing patches and black bars on the back and tail are revealed. Found in a variety of savanna, woodland, and thicket habitats. Very similar to Emerald-spotted Wood-Dove, but slightly paler, especially on the head, and there is little overlap in range. Also similar to Blue-spotted Wood-Dove, but separated by the all-black bill. The song starts with a few hesitant notes, then accelerates into a long series of “boop” notes.
Brown-capped Fantail
Rhipidura diluta
A small brown songbird with a long tail, often raised and fanned to reveal white outer tail feathers. Largely dull brown with a rufous flash in the wing, a white throat, and a dull buff underside. A montane species, found singly or in pairs, often within mixed-species flocks. Distinguished from Arafura Fantail by plain underside, lacking a black chest. Song recalls a toy trumpet, “cher-wer-where,” rising on the last note. Also gives agitated chattering notes, a wet “wit,” and a sharp “pip.”
Slaty-backed Forest-Falcon
Micrastur mirandollei
Forest-falcons are well-named raptors; they are found almost exclusively inside the forest. They are generally slender and long-tailed, with long legs. Slaty-backed is clean-looking, smooth gray above and white below. Juveniles have a scaly pattern on breast. Similar to several other raptors, including Bicolored Hawk; note more extensive yellow skin around eye. As with all forest-falcons, more often heard than seen, and more easily identified by voice. Sings from the canopy, mostly at dawn and dusk. Listen for series of mournful “aww” notes, similar in tone to Collared Forest-Falcon (but Collared typically gives single notes).
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