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The barn owls (Tyto species, particularly Tyto alba) are the most widely distributed group of owls in the world. They are medium-sized owls with large heads and characteristic heart-shaped faces. They have long, strong legs with powerful talons. The term may be used to describe:
Twenty to thirty subspecies are usually recognized, varying mainly in body proportions, size, and colour. Barn owls range in colour from the almost beige-and-white nominate subspecies alba, erlangeri, and niveicauda, to the nearly black-and-brown contempta. Island forms are mostly smaller than mainland ones, and those inhabiting forests have ...
The American barn owl (Tyto furcata) is usually considered a subspecies group and together with the western barn owl group, the eastern barn owl group, and sometimes the Andaman masked owl, make up the barn owl, cosmopolitan in range. The barn owl is recognized by most taxonomic authorities. A few (including the International Ornithologists ...
Puerto Rican barn owl (Tyto cavatica) found in Puerto Rico - may still have existed up to 1912; possibly a subspecies of the ashy-faced owl (Tyto glaucops) Noel's barn owl (Tyto noeli) found in Cuba; Rivero's barn owl (Tyto riveroi) found in Cuba; Cuban barn owl (Tyto sp.) found in Cuba; Hispaniolan barn owl (Tyto ostologa) found in Hispaniola
Barn owl on Lithuanian silver coin of 5 litas (2002) The Western Barn owl is relatively common throughout most of its range and is not considered globally threatened. However, locally severe declines from organochlorine (e.g., DDT) poisoning in the mid-20th century and rodenticides in the late 20th century have affected some populations.
The inner ear of barn owls includes the vestibular organ, cochlea, and auditory nerve. The anatomy of the inner ear in barn owls was studied in an experiment where three owls were utilized and fixed at laboratories by the intravascular perfusion of 1% formaldehyde and 1.25% glutaraldehyde in a 0.1 phosphate buffer. [5]
The long-eared owl and barn owls are often compared to the great horned owl as these medium-sized species often occur in abutting habitats and often hunt primarily the same vole and mice species, although the alternate prey of the great horned tends to be much larger, including the smaller owls themselves.
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 name under Linnaean taxonomy .