Tawny Owl (Strix aluco): Facts, Calls, Habitat and Diet

What does a tawny owl look like?

The tawny owl is a chunky, big-headed owl about the size of a pigeon but much bulkier in shape. The round head has no ear tufts, and the pale, fairly plain facial disc is framed by a darker rim. Two pale stripes run from above the eyes toward the crown, which gives the face a gentle, “eyebrowed” look. The eyes are very dark brown, almost black, and the hooked bill is pale yellowish.

The upperparts are mottled and streaked, with a row of white spots along the shoulder feathers, and the underparts are pale with dark streaks. The wings are broad and rounded, and the short tail is finely barred. In flight the tawny owl looks heavy and compact, with quick wingbeats and long, straight glides.

Tawny owls come in two main color forms, called morphs. Rufous birds are warm reddish brown, while gray birds are cold grayish brown, and intermediates are common. Brown birds are typical of the mild, damp west of Europe, including Britain, while gray birds become more common to the east and north, and in the far north almost all tawny owls are gray.

A long-term study in Finland, published in 2011, found that the share of brown birds there had risen as snowy winters became less common. Gray owls had previously survived cold, snowy winters better, so the change in color is seen as one of the clearest examples of a wild bird population responding to a warming climate.

How big is a tawny owl?

The tawny owl is a medium-sized owl, larger than the little owl and long-eared owl but much smaller than the Eurasian eagle-owl. As in most owls, the female is the bigger bird: on average she is about 5% longer and more than 25% heavier than the male.

Size also changes across the range. Tawny owls from Scandinavia and Siberia are about 12% larger and 40% heavier than those in western Europe, with longer wings, a pattern known as Bergmann’s rule, under which animals in cold climates tend to be bigger.

Where do tawny owls live?

The tawny owl lives across temperate Europe, from Portugal, Spain and Great Britain east through central and eastern Europe to Russia and western Siberia. It also breeds in the mountains and forests of northwest Africa, from Morocco to Tunisia, and from Turkey and the Middle East to northern Iran. It does not migrate: adults stay in the same area all year and often for their whole lives.

It is absent from Ireland, Iceland and the treeless far north of Scandinavia, and only a rare visitor to the Balearic and Canary Islands. Tawny owls in the Himalayas and East Asia were once included in this species but are now usually treated as a separate species, the Himalayan owl (Strix nivicolum).

The tawny owl’s main habitat is mature deciduous and mixed woodland with old trees that offer nest holes and sheltered roosts. It also lives in conifer forest with some broadleaf trees, wooded farmland, and, increasingly, in towns: large parks, cemeteries and leafy gardens allow tawny owls to breed in many European cities, including central London. In colder regions it is a lowland bird, but further south it breeds high in the mountains, up to about 1,600 m (5,200 ft) in the Alps.

What do tawny owls eat?

Tawny owls are carnivores that eat mainly small woodland mammals. Wood mice, bank voles, field voles and shrews make up most of the diet in many areas, and tawny owls also take moles, young rats and, rarely, animals up to the size of a young rabbit. Small birds, frogs, earthworms and beetles are also important, especially when rodents are scarce.

The owl usually hunts from a perch, watching and listening, then drops or glides silently onto its prey and seizes it in its talons. Its hearing is so precise that it can catch prey it cannot see well on a dark, overcast night. Prey is swallowed whole, and fur and bones are coughed up later as gray pellets, often found in small piles beneath a roost tree. You can read more about owl diets in what do owls eat?.

Diet changes with the setting. In towns, where rodents are fewer, birds such as sparrows, starlings and thrushes make up a much larger share of the prey. Wet weather is a real problem for tawny owls: the patter of rain masks the faint rustles of mice and voles, and long spells of rain can leave owls hungry.

Calls: the owl that goes twit-twoo

The tawny owl is one of the most vocal owls in Europe. The male’s territorial song is a long, quavering hoot, usually written as “hoo… hu, hu-hu-hu-hooo”, which carries far through woodland on a still night. The female’s most familiar call is a sharp, shrill “kee-wick”. Females can also hoot, though their song is usually wavier and less clear than the male’s.

The famous “twit-twoo” of children’s books, which goes back at least to Shakespeare, is really a duet: one owl calls kee-wick and another answers with a hoot. Most often it is a pair, the female calling and the male hooting in reply. Find out more in why do owls hoot?.

Tawny owls call all year, but they are loudest in autumn, when young birds look for territories and established pairs defend theirs, and again in late winter as the breeding season begins. Recently fledged chicks give a wheezy, hissing begging call in early summer.

Behavior and territories

Tawny owls are strongly territorial. A pair usually stays together for life and defends the same territory year after year, with boundaries that hardly change. Territory size depends on the food supply, from a few hectares in rich woodland to much larger areas in poor habitat. The owls advertise their ownership mainly with their calls.

The tawny owl is strictly nocturnal. It spends the day roosting quietly, often pressed against a tree trunk, hidden in ivy or inside a hollow, where its mottled plumage makes it very hard to spot. Small birds that find a roosting owl often mob it with loud alarm calls, which is one of the best clues that an owl is nearby. To learn how owls hunt in the dark, see can owls see in the dark?.

Because young owls must find empty territories, their first autumn is hard. Young tawny owls that cannot find a vacant territory often starve, so tawny owl numbers in an area are held in check by the number of territories available.

Reproduction and life cycle

Tawny owls nest early. In the south of the range eggs may be laid in February, while in Britain most clutches are laid in March and April, and in Scandinavia rarely before mid-March. The usual nest is a hole in a large tree, but tawny owls also use nest boxes, old nests of crows, magpies and birds of prey, squirrel dreys, and holes in buildings or cliffs.

The female lays a clutch of usually two or three white, rounded eggs and incubates them for about 30 days while the male brings her food. The chicks hatch covered in white down and are fed by both parents. At around four to five weeks old they often leave the nest before they can fly properly and clamber about nearby branches as “branchers”. They fledge at about 35–39 days.

The young remain dependent on their parents for two to three months after leaving the nest. From late summer into autumn they disperse to find territories of their own. Tawny owls can breed when they are one year old, but many young birds wait until they manage to claim a territory.

Tawny owls are bold nest defenders. They may swoop at people, dogs or cats that approach a nest or fledglings and can strike the head with their talons. The British bird photographer Eric Hosking lost his left eye to a tawny owl near its nest in 1937, a story covered in do owls attack people?.

How long do tawny owls live?

The typical lifespan of a wild tawny owl is about four to five years, although adults that have survived their difficult first year have a good chance of living longer. Ringing (banding) records show that wild tawny owls can live more than 20 years, and captive birds have lived beyond 27 years. Most deaths happen in the first year, when young birds starve or are killed while looking for a territory.

Predators, threats and conservation

Adult tawny owls have few predators, but they are sometimes killed by larger birds of prey, including the Eurasian eagle-owl, Ural owl, northern goshawk and golden eagle. Eggs, chicks and fledglings are more vulnerable: pine martens raid nests, and red foxes catch many young owls on the ground after they leave the nest.

The main threats linked to people are road traffic, loss of old trees with nest holes, and collisions with vehicles and wires. In some regions, tawny owls also pick up rodent poisons by eating contaminated prey.

The tawny owl is listed as Least Concern on the IUCN Red List, most recently assessed in 2024. It has a huge range and a large population, estimated at roughly 1–2 million individuals in Europe alone, and numbers are stable or increasing in most European countries, although declines have been recorded in places such as Finland and Italy. In the United Kingdom it is on the Amber List of birds of conservation concern because surveys show a decline.

Like all owls, the tawny owl is listed on Appendix II of CITES, which regulates international trade, and it is protected by law across the European Union and the United Kingdom.

Myths and facts

Myth: an owl’s hoot is an omen of death. For centuries the tawny owl’s eerie call at night was linked with bad luck and death in European folklore. In reality it is simply territorial song, most often heard in autumn and late winter.

Myth: owls can see in total darkness. Tawny owls see very well in dim light, but no animal eye works in complete darkness. On the darkest nights tawny owls rely heavily on their sensitive, asymmetric ears to locate prey.

Fact: owls pick a territory for life. Most tawny owls spend their whole adult lives in one patch of woodland, and pairs often stay together for many years.

Relationship with people

The tawny owl is one of the most familiar wild owls in Europe, more often heard than seen. It is often the first owl people meet in town parks and gardens, and it readily uses large nest boxes put up by conservation groups. It also features in owls in the UK, where it is by far the commonest of the five breeding owl species. Because it eats many mice and voles, it is welcomed on farms and in woodland, and its calls are one of the best-loved night sounds of the European countryside.