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[7] [19] [48] Owls have extremely large eyes which are nearly the same size in large species such as the snowy owl as those of humans. [49] The snowy owl's eye, at about 23.4 mm (0.92 in) in diameter, is slightly smaller than those of great horned and Eurasian eagle-owls but is slightly larger than those of some other large owls.
Owls are divided into two families: the true (or typical) owl family, Strigidae, and the barn owl family, Tytonidae. [2] Owls hunt mostly small mammals, insects, and other birds, although a few species specialize in hunting fish. They are found in all regions of the Earth except the polar ice caps and some remote islands.
Snowy Owl is an engraving by naturalist and painter John James Audubon. It was printed full size and is an early illustration of a snowy owl and part of The Birds of America . It was first published as part of a series in sections around 1831.
One of the largest snowy owl irruptions in recent history was the winter of 2017-18, when 280 of the big birds were documented in Wisconsin, according to DNR data.
The 20 species of genera Tyto and Phodilus, the barn owls, are in family Tytonidae. The other 234 species are in family Strigidae, the "typical owls". Five species on the list are extinct; they are marked (X). [1] For a partial list with additional information, see the article "List of Strigiformes by population".
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 ...
A snowy owl holds part of an American coot in its mouth as it stands on a chimney cap in the Bay View neighborhood of Milwaukee. The bird, the first of its kind seen in Milwaukee this winter, was ...
The taxonomic treatment [3] (designation and sequence of orders, families and species) and nomenclature (common and scientific names) used in the accompanying bird lists adheres to the conventions of the AOS's (2019) Check-list of North American Birds, the recognized scientific authority on the taxonomy and nomenclature of North America birds.