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The great grey owl (Strix nebulosa) (also great gray owl in American English) is a true owl, and is the world's largest species of owl by length. It is distributed across the Northern Hemisphere , and it is the only species in the genus Strix found in both Eastern and Western Hemispheres.
Compared to other owls of similar size, the barn owl has a much higher metabolic rate, requiring relatively more food. Relative to its size, barn owls consume more rodents. Studies have shown that an individual barn owl may eat one or more voles (or their equivalent) per night, equivalent to about fourteen percent of the bird's bodyweight.
Eastern grass owl: Tyto longimembris (Jerdon, 1839) 17 Itombwe owl: Tyto prigoginei (Schouteden, 1952) 18 Oriental bay owl: Phodilus badius (Horsfield, 1821) 19 Sri Lanka bay owl: Phodilus assimilis Hume, 1877: 20 Papuan hawk-owl: Uroglaux dimorpha (Salvadori, 1874) 21 Laughing owl (X) Ninox albifacies (Gray, GR, 1844) 22 Rufous owl: Ninox rufa ...
Cross sectioned great grey owl specimen showing the extent of the body plumage, Zoological Museum, Copenhagen Skeleton of a Strigidae owl. While typical owls (hereafter referred to simply as owls) vary greatly in size, with the smallest species, the elf owl, being a hundredth the size of the largest, the Eurasian eagle-owl and Blakiston's fish owl, owls generally share an extremely similar ...
This clip of a Great Gray Owl and her owlets is actually part of a longer video made by a family on YouTube a few years ago in which two teenagers observe and document the birth, caretaking, and ...
In comparison, the lightest mean prey mass in dietary studies of the great horned owl was 22.5 g (0.79 oz) while the highest was 610.4 g (1.346 lb). [ 17 ] [ 22 ] Most dietary studies place the average weight of Eurasian eagle-owl prey in the zone of 100 to 500 g (0.22 to 1.10 lb), thus the species fits well within the rule of thumb that most ...
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