The feathers making up this disc can be adjusted to sharply focus sounds from varying distances onto the owls' asymmetrically placed ear cavities. Owls possess large, forward-facing eyes and ear-holes, a hawk-like beak, a flat face, and usually a conspicuous circle of feathers, a facial disc, around each eye. Anatomy Burrowing owl ( Athene cunicularia) Cross-eyed owl Ī group of owls is called a "parliament". Owls are divided into two families: the true (or typical) owl family, Strigidae, and the barn-owl family, Tytonidae. They are found in all regions of the Earth except the polar ice caps and some remote islands. Owls hunt mostly small mammals, insects, and other birds, although a few species specialize in hunting fish. Exceptions include the diurnal northern hawk-owl and the gregarious burrowing owl. Owls are birds from the order Strigiformes ( / ˈ s t r ɪ dʒ ə f ɔːr m iː z/), which includes over 200 species of mostly solitary and nocturnal birds of prey typified by an upright stance, a large, broad head, binocular vision, binaural hearing, sharp talons, and feathers adapted for silent flight. Left Strigidae: Tawny owl ( Strix aluco), Eurasian eagle-owl ( Bubo bubo), Little owl ( Athene noctua), Northern saw-whet owl ( Aegolius acadicus) Right Tytonidae: Barn owl ( Tyto alba), Lesser sooty owl ( Tyto multipunctata), Tasmanian masked owl ( Tyto novaehollandiae castanops), Sri Lanka bay owl ( Phodilus assimilis).
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