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Forster, 1772. 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.
Owls lock onto prey by using sound localization. [ 2 ] Sound localization is an animal’s ability to identify the origin of a sound in distance and direction. [ 3 ] Several owl species have ears that are asymmetrical in size and location, which enhances this ability.
The great horned owl (Bubo virginianus), also known as the tiger owl (originally derived from early naturalists' description as the "winged tiger" or "tiger of the air") [ 3 ] or the hoot owl, [ 4 ] is a large owl native to the Americas. It is an extremely adaptable bird with a vast range and is the most widely distributed true owl in the ...
The Eurasian eagle-owl is one of the most widely distributed of all owl species, although it is far less wide-ranging than the barn owl, the short-eared owl (Asio flammeus) and long-eared owl and lacks the circumpolar range of boreal species such as great grey owl, boreal owl and northern hawk owl (Surnia ulula).
Blakiston's fish owl measures 60 to 72 cm (24 to 28 in) in total length, and thus measures slightly less at average and maximum length than the great gray owl (Strix nebulosa), a species which has a significantly lower body mass. [6] [15] The Eurasian eagle-owl (B. bubo) is sometimes considered the largest overall living owl species.
Cross sectioned great grey owl specimen showing the extent of the body plumage, Zoological Museum, Copenhagen Skeleton of a true owl (Strigidae). 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 ...
List of birds of Michigan. The American robin is the state bird of Michigan. This list of birds of Michigan includes species documented in the U.S. state of Michigan and accepted by the Michigan Bird Records Committee (MBRC). As of January 2023, there are 456 species included in the official list. [1] Of them, 92 are classed as accidental, 47 ...
In ornithology, the facial disc is the concave collection of feathers on the face of some birds —most notably owls —surrounding the eyes. The concavity of the facial disc forms a circular paraboloid that collects sound waves and directs those waves towards the owl's ears. The feathers making up this disc can be adjusted by the bird to alter ...