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Eurasian pygmy owl in natural habitat. The smallest European owl sits on the moss.

The common owl, bubo bubo, squinted his eye and looks ahead. Portrait. Close-up.

Beautiful tawny owl (Strix aluco) sitting in an old oak tree.

Barn Owl, tyto alba, Adult in flight, Normandy

eagle owl isolated on black with one eye closed

Short-eared Owl (Asio flammeus) - nocturnal bird

$An Owl's daily activity begins with preening, stretching, yawning and combing its head with its claws. The plumage is often ruffled up, and claws and toes are cleaned by nibbling with the beak. The Owl will then leave its roost, sometimes giving a call (especially in breeding season)\n\nLike most owls, the barn owl is nocturnal, relying on its acute sense of hearing when hunting in complete darkness. It often becomes active shortly before dusk and can sometimes be seen during the day when relocating from one roosting site to another. In Britain, on various Pacific Islands and perhaps elsewhere, it sometimes hunts by day. This practice may depend on whether the owl is mobbed by other birds if it emerges in daylight. However, in Britain, some birds continue to hunt by day even when mobbed by such birds as magpies, rooks and black-headed gulls, such diurnal activity possibly occurring when the previous night has been wet making hunting difficult. By contrast, in southern Europe and the tropics, the birds seem to be almost exclusively nocturnal, with the few birds that hunt by day being severely mobbed.\n\nBarn owls are not particularly territorial but have a home range inside which they forage. For males in Scotland this has a radius of about 1 km (0.6 mi) from the nest site and an average size of about 300 hectares. Female home ranges largely coincide with that of their mates. Outside the breeding season, males and females usually roost separately, each one having about three favored sites in which to conceal themselves by day, and which are also visited for short periods during the night. Roosting sites include holes in trees, fissures in cliffs, disused buildings, chimneys and haysheds and are often small in comparison to nesting sites. As the breeding season approaches, the birds move back to the vicinity of the chosen nest to roost.$

East European Ural owl (Strix uralensis uralensis).

Close-up of an Eurasian eagle-owl yawning

Portrait of Tawny owl or brown owl (Strix aluco)

The tawny owl, also called the brown owl, is commonly found in woodlands across Europe to western Siberia, and has seven recognized subspecies. It is a stocky, medium-sized owl, whose underparts are pale with dark streaks, and whose upper body may be either brown or grey.

A Tawny Owl perching on a tree trunk in woodland scenic

Long Eared Owl, asio otus, Adult in Flight, Normandy in France,

$L 59-73cm, WS 138-170cm.\nResident in mountains an forests, preferring areas with rocks, steep cliffs and mature trees (preferably conifers); often in rocky archipelagos. Scattered distribution, generally rare and local.\nNocturnal and partly crepuscular. Day roost in dense mature spruces or firs, or in cave or crevice.\nFood mammals (voles, rats, hedgehogs, hares) and birds (corvids, gulls, wildfowl).\nNests on inaccessible cliff-edge or less often on the ground by rock, uprooted tree or among boulders, exceptionally in abandoned raptor’s nest or n barn, abandoned factory, etc.\nIn spite of its size and its impressive claws is by and large a non-violent and retiring owl near its nest, and aggressive behaviour toward humans is rare.\n\nThis is a scarce owl in the eastern and Southern part of the Netherlands and is mostly breeding in abandoned Quarries.\n\nThis Picture is made at a Birds of Prey Farm near Lunteren (Gelderland, the Netherlands).$

Owls and eagle owl in the night. Illustration of thermal image.

Male Eurasian pygmy owl (Glaucidium passerinum) perching on a tree in a forest.

Northern Harrier (Circus cyaneus) flying over a marsh in search of prey. Delta, B.C., Canada

The tawny owl or brown owl - Strix aluco is a stocky, medium-sized owl commonly found in woodlands across much of the Palearctic.

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