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Barred owls tend to focus on fairly small-sized prey, although are capable of attacking larger than usual prey in infrequent cases. [123] [116] The mean size of prey taken is seldom estimated in the barred owls' eastern range, although one study estimated mean size of prey in the general east was 33.5 g (1.18 oz). [136]
Owls are divided into two families: the true (or typical) owl family, Strigidae, and the barn owl and bay 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.
Medium-sized, dark brown with a pumpkin-shaped head with small 'ear' tufts. [3] The facial disc is pale buff, with a distinct dark brown rim with buff speckles. There is a dark brown area around the eyes, which are also dark brown. [4] Its ear-tufts are earth-brown and quite small, often not visible, and set near the centre of the forehead. [4]
Barn owls overall are darker on the back than the front, usually an orange-brown colour, the front being a paler version of the back or mottled, although considerable variation is seen even within species. Bay owls closely resemble the Tyto owls, but have a divided facial disc, ear tufts, and tend to be smaller.
A dark and overall brownish form with heavily barred and mottled underside, with a dull tawny base. Inland birds (lagophonus) tend to have a more grayish base, the coastal owls being more richly brown. Otherwise, inland and coastal owls are practically the same. The facial disc can range from gray to reddish-gray to dark rufous.
Unlike diurnal birds of prey, owls normally have only one fovea, and that is poorly developed except in daytime hunters such as the short-eared owl. [14] Hearing is important for a nocturnal bird of prey, and as with other owls, the tawny owl's two ear openings differ in structure and are asymmetrically placed to improve directional hearing. A ...
Not infrequently, Ural owls will duet during courtship. [5] In addition, a deep, hoarse heron-like kuwat or korrwick is probably used as a contact call. [5] [8] These are more elongated and harsher than the kewick note made by tawny owls (Strix aluco). [5] [8] Young beg with hoarse chrrreh calls, again similar to the ones by young tawny owls ...
The owls have prominent white eyebrows and a white "chin" patch which they expand and display during certain behaviors, such as a bobbing of the head when agitated. Adults have brown heads and wings with white spotting. Their chests and abdomens are white with variable brown spotting or barring, also depending on the subspecies.