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Northern Hawk Owl; Surnia ulula ... Weight: 10 - 13 ounces; This owl has a large round head with no ear tufts. Its eyes and bill are yellow and it has a thick black stripe on each side of its whitish face. Its forehead is spotted white. Its breast is whitish with dark brown horizontal stripes.
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www.kidwings.com/species/northern%20hawk%20owl/
www.kidwings.com/species/northern%20hawk%20owl/
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Northern Hawk Owl Biology; A Reference for North and Central American Owls ... Measurements & Weights:; Wing Span: 31 - 35 in. Length: 14.5 - 17.5 in. Tail: 6.25 - 7.5 in. Average Weight: Male: 10.7 oz. Female: 12.3 oz.
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www.owling.com/N-Hawk_nh.htm
www.owling.com/N-Hawk_nh.htm
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Description: A medium sized Owl. Facial disc is whitish, broadly rimmed blackish at sides. ... Prey weight is normally below 70g. Hunts by searching from a lookout, then quickly flying to swoop down on prey. Has been observed hovering also. ... Voous, Karel H.. 1988. "Owls of the Northern Hemisphere". The MIT Press...
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www.owlpages.com/owls.php?genus=Surnia&species=ulula
www.owlpages.com/owls.php?genus=Surnia&species=ulula
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Northern Hawk Owls (Surnia ulula) have been reported to cache prey during the breeding season ... Weight-carrying ability and caching behavior of Gray Jays, ...
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www.bioone.org/doi/abs/10.1676/06-151.1
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The Northern Hawk Owl (Surnia ulula) is “one of the least-studied birds of North America” .... Weight-carrying ability and caching behavior of Gray Jays, ...
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www.bioone.org/doi/pdf/10.1676/06-151.1
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The Northern Hawk Owl can detect prey by sight at a distance of up to 800 meters (half a mile). ... Though it is thought to detect prey primarily by sight, the Northern Hawk Owl can find and seize prey under 30 cm (1 foot) of snow.
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www.allaboutbirds.org/guide/Northern_Hawk_Owl/lifehisto...
www.allaboutbirds.org/guide/Northern_Hawk_Owl/lifehistory
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Order: Owls (Strigiformes); Family: Typical owls (Strigidae); Average weight: ... The northern hawk owl will attack people who get too close to its nest or too close to the chicks when they have left the nest. Thanks to the comb-like construction of its front quills and its woolly plumage, the northern hawk owl is silent...
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www.skansen.se/pages/?ID=930
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Weight: 298 g (10.5 oz) ... Northern Hawk Owl: Medium-sized, slender owl with white-spotted brown upperparts and brown-barred white underparts. The gray facial disk is partially bordered by a thick, brown stripe that extends to the upper breast;
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whatbird.wildbird.com/obj/18/Identification/target.aspx
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