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a b c Martin G.R. (1982). "An owl's eye: schematic optics and visual performance in Strix aluco L". J Comp Physiol. 145 (3): 341–349. doi: 10.1007/BF00619338. S2CID 35039625.
Additionally, the cervical vertebrae are interconnected by solid ligaments and muscles, enhancing the owl’s ability to rotate its head.
It can be found in wide-open marshes, grasslands, prairies, and agricultural areas over most of North America and Eurasia. It is a medium-sized owl (13-17 inches in length). It preys on small mammals by flying close to the ground in the afternoon, at dusk or dawn, and seizing them with its talons. Credit: https://boneclones.com/ This unique skeletal feature gives owls a distinct advantage in hunting, as they can spot prey from different angles without moving their entire bodies. Minerva (Middle – Late Eocene of western U.S.) formerly Protostrix, includes "Aquila" ferox, "Aquila" lydekkeri, and "Bubo" leptosteus
Duncan, James (2013). The Complete Book of North American Owls. Thunder Bay Press, San Diego. ISBN 978-1-60710-726-2.
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Genus Bubo – the horned owls, eagle-owls and fish-owls; paraphyletic with the genera Nyctea, Ketupa, and Scotopelia, some 25 species The owl’s ribcage protects vital organs, such as the heart and lungs. The sternum, or breastbone, features a pronounced keel that provides an anchor for the bird’s strong flight muscles. Ghauri, Pervez; Cateora, Philip (16 August 2021). EBOOK: International Marketing, 5e. McGraw Hill. ISBN 978-1-5268-4860-4. Bachmann T.; Klän S.; Baughmgartner W.; Klaas M.; Schröder W. & Wagner H. (2007). "Morphometric characterisation of wing feathers of the barn owl Tyto alba pratincola and the pigeon Columba livia". Frontiers in Zoology. 4: 23. doi: 10.1186/1742-9994-4-23. PMC 2211483. PMID 18031576.