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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 whole family Tytonidae, though this also includes the bay owls in the genus Phodilus Tyto , the largest genus of birds in Tytonidae, and particularly these species in that genus: Three species that are sometimes considered to be a single species known as barn owl or common barn owl :
The barred eagle-owl is a fairly large owl but relatively small eagle-owl, ranging from 40 to 48 cm (16 to 19 in) in length. [5] There is almost no size sexual dimorphism in this species (although some females are marginally larger than the males) and adjacent island subspecies vary dramatically in size, both unusual attributes for eagle-owls.
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 ...
The adult Wallace scops owl has a body length of 23 to 27 cm (9 to 10 1/2 inches), a wingspan between 202 and 251 cm (79 1/2 and 99 inches), and can weigh around 210 g (7 1/2 ounces). [ 4 ] This small bird has a characteristic owl-shaped face with long ear tufts and bright yellow eyes. [ 4 ]
The Sulawesi masked owl was first described by the German ornithologist Hermann Schlegel in 1866 as Strix rosenbergii, but was later included in the genus Tyto. [3] The specific name "rosenbergii" refers to the German surveyor and naturalist Hermann von Rosenberg who collected bird specimens in the East Indies and sent them to the National Museum of Natural History in Leiden to be classified. [4]
Long-eared owls are 19.5% of owls (or 197 total owls) recorded migrating through Cape May Point in fall (against a majority, 60.6%, being saw-whet owls), with 26.1% of the specimens from the species caught in the mist nets being adults. More than 90% of long-eared owls migrate between mid-October and late November, with the immatures migrating ...
Genomic studies of the extinct laughing owl of New Zealand indicate that it actually belongs in Ninox rather than the monotypic genus Sceloglaux. [5] The fossil owls "Otus" wintershofensis and "Strix" brevis , both from the Early or Middle Miocene of Wintershof, Germany, are close to this genus; the latter was sometimes explicitly placed in ...