Hawk Owl

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Hawk Owl

 

(Surnia ulula), a bird of the order Strigiformes. The body length is 36–41 cm, and the weight, 250–360 g. The females are larger than the males. The head is relatively small, and the facial disk is incomplete. The wings are long and pointed, the long tail is sharply graduated, and the tarsometatarsi and toes are densely feathered. The plumage is brown, with white spots on the upper parts; the underparts are light, with dark transverse stripes, as in hawks (hence the name). The bill is yellow.

The hawk owl is distributed in northern Europe, Asia, and North America. In the USSR it is found in the forest zone as far east as Kamchatka and Sakhalin and in the spruce forests of the Tien-Shan. It is either sedentary, or it wanders in the winter. It inhabits tall-trunked forests. It nests in tree hollows or on the tops of broken trunks, or it occupies the nests of other birds. The clutch usually contains three or four eggs, and in years when food is abundant it contains as many as seven to nine. The hawk owl hunts in the morning and the evening for rodents, more rarely for birds.

References in periodicals archive ?
Northern Hawk Owls breed in south-central Alberta, although the nearest confirmed breeding site is near Calgary, approximately 250 km north of our 1994 nest site (Federation of Alberta Naturalists 2007).
Prey caching by non-breeding Northern Hawk Owls in Alberta.
Northern Hawk Owls and recent burns: Does burn age matter?
Reproductive biology of Hawk Owls in Denali National Park, Alaska.
Observations of Northern Hawk Owls nesting in Roseau County.
Observations on nesting Hawk Owls at the Mer Bleue, near Ottawa, Canada.
Key words: diet, Glacier National Park, management, Montana, nesting, Northern Hawk Owl, prey caching, prey plucking, status, Surnia ulula
The Northern Hawk Owl (Surnia ulula) is patchily distributed across the boreal forests of northern Eurasia and North America (Duncan and Duncan 2014).
Plucking of dead prey by the Northern Hawk Owl has previously been described by Kertel (1986), Nero (1995), and Duncan and Duncan (2014).
Until the hawk owl arrived, regional notice had been largely avoided in the town since two proposed landfill projects were abandoned in the 1980s and 1990s.
Whether or not a northern hawk owl will quarter in Root again is a complicated question.