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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.
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.
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 ...
S. v. helveola. S. v. varia. Synonyms. Syrnium varium. The barred owl (Strix varia), also known as the northern barred owl, striped owl or, more informally, hoot owl or eight-hooter owl, is a North American large species of owl. A member of the true owl family, Strigidae, they belong to the genus Strix, which is also the origin of the family's ...
The barred owl is an owl species native to the Eastern United States, but has invasively expanded west into the habitat ranges of the northern spotted owl. Invasion of barred owls into the northern spotted owl’s habitat has occurred recently, with all of northern spotted owl territory now also inhabited by the barred owl. [29]
Boreal owl mortality rates vary by region and age. In Idaho, adult annual survival rate was 46%, [40] while in Finland, first-year males had a survival rate of 50%, and adult males 67%. Most fledgling males (78%) died before their first breeding attempt. [41] Overall, adult survival ranges from 62% to 72% across studies.
True owl. The true owls or typical owls (family Strigidae) are one of the two generally accepted families of owls, the other being the barn owls (Tytonidae). This large family comprises 230 living or recently extinct species in 24 genera. The typical owls have a cosmopolitan distribution and are found on every continent except Antarctica.
The Eurasian eagle-owl (Bubo bubo) is a species of eagle-owl, a type of bird that resides in much of Eurasia. It is also called the Uhu and 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).