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World Owl Trust - leading the World in Owl Conservation
Tuesday 2nd September, 2014

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Northern Hawk Owl
Surnia ulula
Northern Hawk Owl - Surnia ulula ulula  Hawk Owl Juveniles
Northern Hawk Owl - Surnia ulula ulula
As of February 2005.
Description Medium sized slender owl with long tail. Dark greyish (grayish) above with white spots, whitish below with dense, dark barring. Indistinct, whitish facial disk with black border. Yellow eyes.
Size 36-41cm, 270-400g
Range Boreal zones of N America and Eurasia.
Habitat Open boreal coniferous forest with moorland.
Food Mainly small mammals particularly lemmings and voles, but also birds, frogs and even fish.
Breeding April-May, nests in cavities on rotting stumps, and in trees and woodpecker holes. 5-13 eggs are incubated for 25-30 days, and the young leave the nest by 30 days after hatching and can fly within another 2 weeks. They become independent after a further 8 weeks.
Call Purring, 3-4 second, melodious trill.
Status Not globally threatened, but never particularly numerous. Numbers fluctuate with rodent populations, but believed to have declined in Europe.
Comments Although a familiar owl, more studies are required on the ecology of this species.
Races No additional information.
S.u.ulula From Scandinavia through Siberia to Sakhalin and N China
S.u.tianschanica Tien Shan
S.u.caparoch Alaska across N. America to Labrador
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The World Owl Trust is a member of BIAZA
The World Owl Trust is a member of the British and Irish Association of Zoos and Aquariums (BIAZA) and the European Association of Zoos and Aquariums (EAZA). The Trust relies on a dedicated membership, visitors, donations and legacies.
The World Owl Trust is a member of EAZA

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