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Morepork - Ninox novaeseelandiae

Also known as New Zealand Boobook Owl, Ruru

 
Calls - Ninox novaeseelandiae
Typical call Paparoa National Park, New Zealand. November 2012. CC George Wagner

Introduction: The Morepork is a medium-sized owl with a rounded head and no ear-tufts. Its name is derived from its well-known double hoot call.

[For help with terms used in the description, see parts of an owl. For general characteristics common to most owl species, see owl physiology.]

Description: There are many colour morphs, with considerable variation in plumage.
The facial disc is dark brown with a pale buff rim, and with narrow whitish eyebrows. The eyes are bright golden-yellow, and the bill is dark with a pale tip.
Upperparts are dark brown, with ochre-buff mottling and streaks on the head, neck and mantle. Wing-coverts and scapulars are spotted cinnamon-buff and whitish-buff. Flight feathers are dark to blackish-brown, with narrow cinnamon-buffish bars. The tail is dark brown with narrow ochre or buffish bars.
The throat to the upper breast is brownish-white to pale buff with dark chocolate-brown flecks and streaks. The rest of the underparts have spotted feathers, with each feather whitish, with a dark shaft-streak and a dark terminal bar.
Tarsi are feathered yellowish-brown to reddish-buff. Toes are yellow to brownish-yellow and normally bristled, but occasionally bare. Claws are dusky brown to blackish.

Size: Length 26-29cm. Wing length 183-222mm. Tail length 135-146mm. Weight 150-216g. Females are usually larger and heavier than males.

Habits: This owl is commonly seen at dusk, when it begins hunting. Roosts during the daytime in dense canopies or in a tree-hole.

Voice: The characteristic call is an individually variable double-hoot "Quor-quo", or, as the name suggests "More-pork" at a similar pitch to a dove's call. These notes are repeated at intervals of several seconds. A common variation is a repetitive and often prolonged "more-pork-pork-pork...". There is also a scream and a vibrating "cree-cree", heard mainly in the breeding season.

Hunting & Food: Hunts from early dusk, and takes mainly insects including moths and beetles, as well as spiders. Prey is caught from a perch or hawked in flight. Other prey items include lizards, small birds, rats, bats and mice.

Breeding: Laying begins in early October, with a peak in November. Nesting sites are in hollow trees, tree holes, or dense clumps of vegetation, and sometimes in a tree fork, or even in a depression of on top of an old sparrow nest. Two, occasionally three roundish white eggs (38.0 x 32.7mm average) are laid at a two-day interval and incubated for 30-31 days by the female alone, while the male provides the food. Both parents feed the chicks after they hatch. Chicks leave the nest by 34 days old, and are cared for by both parents for some time afterwards.
Sexual maturity is reached in the first year, but normally males will breed at the age of two years, and females three years.

Habitat: Forest and farmland, also urban areas and plantations. Ranges from lower altitudes up to the timberline.

Distribution: New Zealand - North Island and surrounding islands including Little and Greater Barrier, Three Kings and Kapiti. South Island and Stewart Island. Also on the distant Norfolk Island. Probably extinct from Lord Howe Island.

Distribution of Morepork - Ninox novaeseelandiae
Distribution of the Morepork Ninox novaeseelandiae

Status: Not uncommon.

Original Description: Gmelin, Johann Friedrich. 1788. Systema Naturae, 1, Pt.1, p. 296.

Subspecies: N. n. novaeseelandiae, N. n. albaria, N. n. undulata

References:

Boyer and Hume. 1991. "Owls of the World". BookSales Inc
del Hoyo, Elliott & Sargatal. 1999. "Handbook of the Birds of the World: Barn Owls to Hummingbirds". Buteo Books
Duncan, James R. 2003. "Owls of the World: Their Lives, Behavior and Survival". Firefly Books
König, Claus & Weick, Friedhelm. 2008. "Owls: A Guide to the Owls of the World (Second Edition)". Yale University Press
König, Weick and Becking. 1999. "Owls: A Guide to the Owls of the World". Yale University Press
Mikkola, Heimo. 2012. "Owls of the World: A Photographic Guide". Bloomsbury

Page Information:

Page compiled by Page last updated 2013-09-03

OwlPages.com Owl Species ID: 240.060.000