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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.
Strix sp. (Late Miocene of Nebraska, USA) Strix sp. (Late Pliocene of Rębielice Królewski, Poland) apparently similar to the great grey owl [4] Strix intermedia (Early - Middle Pleistocene of EC Europe) – may be paleosubspecies of S. aluco; Strix brea (Late Pleistocene of SW North America) Now placed in its own genus. (See below)
Ural owls do not generally occur with other Strix owls excepting the tawny owl but overlap in much of their range also with the great grey owl, which furthermore ranges farther north and into the Americas as well. Despite its large size, the great grey owl is a dietary specialist on voles, relying almost exclusively on them.
Rusty-barred owl: Strix hylophila Temminck, 1825: 245 Chaco owl: Strix chacoensis Cherrie & Reichenberger, 1921: 246 Rufous-legged owl: Strix rufipes King, PP, 1827: 247 Ural owl: Strix uralensis Pallas, 1771: 248 Great grey owl: Strix nebulosa Forster, JR, 1772: 249 African wood owl: Strix woodfordii (Smith, A, 1834) 250 Mottled owl: Strix ...
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 ...
A likely event of predation by a barred owl on an adult great grey owl was observed. The authors hypothesized that the victim may have been a smaller male great grey owl (which can be about the same body mass as a large female barred) but this is the only known instance to date of a great gray owl being killed by another species of Strix owl. [208]
Strix is a genus of owls in the family Strigidae. ... Great grey owl; H. Himalayan owl; M. Maghreb owl; Mottled owl; Mottled wood owl; N. Northern spotted owl; O ...