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The largest owls are two similarly sized eagle owls; the Eurasian eagle-owl (Bubo bubo) and Blakiston's fish owl (Bubo blakistoni). The largest females of these species are 71 cm (28 in) long, have a 190 cm (75 in) wing span, and weigh 4.2 kg ( 9 + 1 ⁄ 4 lb).
The eastern screech owl (Megascops asio) or eastern screech-owl, is a small owl that is relatively common in Eastern North America, from Mexico to Canada. [1] [3] This species resides in most types of woodland habitats across its range, and is relatively adaptable to urban and developed areas compared to other owls. Although it often lives in ...
The Eurasian eagle-owl (Bubo bubo) is a species of eagle-owl, a type of bird that resides in much of Eurasia. It is often just called the eagle-owl in Europe and Asia. [4] It is one of the largest species of owl. Females can grow to a total length of 75 cm (30 in), with a wingspan of 188 centimetres (6 feet 2 inches). Males are slightly smaller ...
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.
Although bay owls are typically smaller at 22–29 cm (8.7–11.4 in) long, they bear some resemblance to the barn owls. [1] Other characteristics of the bay owl are groupings of feathers that resemble ears, and a divided face disk. [1] Bay owls have also been described as having U-or V-shaped faces.
The American barn owl is a medium-sized, pale-coloured owl with long wings and a short, squarish tail. [3] However, the largest-bodied race of barn owl, T. f. furcata from Cuba and Jamaica, is also an island race, albeit being found on more sizeable islands with larger prey and few larger owls competing for dietary resources. [4]
The northern saw-whet owl (Aegolius acadicus) is a species of small owl in the family Strigidae. The species is native to North America. Saw-whet owls of the genus Aegolius are some of the smallest owl species in North America. They can be found in dense thickets, often at eye level, although they can also be found some 20 ft (6.1 m) up.
Despite its slightly larger size, the Blakiston's fish owls voice is not as sonorous or as far-carrying as is the Eurasian eagle-owl's voice is. The fish owl's voice is rather deeper, however. [22] As in most owls, vocal activity tends to peak directly before nesting activity begins, so peaks around February in this species. [22]