Eagle Owl
The Eurasian eagle owl (Bubo bubo) ranks among the largest owls on Earth, with a wingspan that can reach 188 centimetres and a body weight of up to four kilograms in the largest females. Its most immediately striking features are the vivid orange eyes and the prominent ear tufts that frame its broad, rounded face. This owl ranges from the Iberian Peninsula across Europe and Asia all the way to the Pacific coast of Russia, taking in forests, rocky gorges, open steppe, and mountain terrain along the way. It hunts almost entirely at night, catching rabbits, hares, hedgehogs, corvids, ducks, and on occasion young foxes. A mated pair holds a territory centred on a bare cliff ledge or rocky outcrop, where the female lays her eggs directly on the ground. The IUCN lists the species as Least Concern, and populations across much of Europe have grown steadily since hunting was banned.
Habitat and distribution
Few birds occupy as wide a range as the Eurasian eagle owl. It breeds from the Iberian Peninsula through virtually all of Europe, across Russia and Central Asia, and into China, the Korean Peninsula, and the Russian Far East. Populations also exist in parts of the Middle East, including Iran, Iraq, Israel, and Lebanon. Rather than committing to a single habitat type, this owl is remarkably adaptable. It thrives in rocky gorges, dense forests, open steppe, semi-desert, and mountain slopes up to significant elevations. The one consistent requirement is access to cliffs, rock faces, or steep embankments for nesting. In parts of Scandinavia and Central Europe, eagle owls have even moved into quarries and river valleys, showing just how flexible they can be when suitable nest sites are available.
Diet
As a predator at the top of the nocturnal food chain, the eagle owl takes a remarkably broad range of prey. Rabbits and hares form the backbone of its diet across much of its range, but it also regularly catches hedgehogs, rats, ducks, corvids such as crows and jays, and other medium-sized birds. In some areas it has been recorded killing birds of prey, including smaller owl species and even buzzards. On occasion it targets young foxes or other small carnivores. Prey is located using acute hearing and sharp eyesight, then seized with powerful talons that can exert crushing force. Indigestible material such as fur, feathers, and bones is later regurgitated as compact pellets, which researchers use to study exactly what these owls have been eating.
Behavior
Throughout most of the year, eagle owls are active from dusk until the early hours of the morning, spending the daylight hours roosting against a rock face or tucked into dense vegetation where their streaked brown plumage provides excellent camouflage. Mated pairs hold large territories, which they defend vocally rather than through constant physical confrontation. A pair that establishes itself on a cliff will often return to the same ledge year after year, with some sites known to have been used continuously for several decades. Outside of the breeding season, juveniles disperse widely in search of their own territories, sometimes traveling hundreds of kilometers. Despite their size, eagle owls fly with surprising silence, aided by the soft fringes on their flight feathers that muffle the sound of air passing over the wing.
Vocalizations
Sound plays a central role in the life of the eagle owl. The male produces a deep, resonant "oo-hu" call that carries across open landscapes for several kilometers on a calm night. The female has a slightly higher pitched version of the same call, and paired birds often duet, with the two voices overlapping in a way that makes the exchange instantly recognizable. Calling peaks in the winter months, from around December through February, when pairs are reinforcing their bond and advertising their territory before eggs are laid. Young owls produce a persistent, rasping food call that adults can locate easily even in dense cover. When threatened at close range, eagle owls snap their bills loudly, spread their wings, and raise their feathers to appear as large as possible.
Conservation
The IUCN currently lists the eagle owl as Least Concern, reflecting a genuinely positive trend across much of its European range. For much of the nineteenth and early twentieth centuries, the species was relentlessly persecuted. Gamekeepers, farmers, and hunters shot or trapped eagle owls in large numbers, viewing them as a threat to game birds and livestock. Populations collapsed in many countries, and the species disappeared entirely from parts of Western Europe. Legal protection, introduced progressively from the 1970s onward, allowed numbers to recover. Reintroduction programs in Germany, Switzerland, and several other countries helped speed that process along. Today the main threats are collisions with vehicles and powerlines, disturbance at nest sites, and secondary poisoning from rodenticides. Overall, though, the outlook for this owl is considerably better than it was a century ago.
5 Curiosities about the Eagle Owl
Here are five things about the eagle owl that tend to surprise people: • With a wingspan reaching up to 188 centimetres, it is one of the largest owls on Earth, heavier than most hawks and buzzards. • Its vivid orange eyes cannot move in their sockets at all. To look sideways, the owl must turn its entire head, which it can rotate up to 270 degrees. • Eagle owls have been documented preying on other raptors, including peregrine falcons, goshawks, and eagle owls smaller than themselves. • The female does all of the incubating while the male brings her food. She rarely leaves the nest during the five-week incubation period. • In the wild, eagle owls can live for over 20 years, and individuals in captivity have reached more than 60 years of age.
Technical factsheet
Where it is found
The Eagle Owl can be found in places such as:
Frequently Asked Questions
What does the eagle owl eat?
Eagle owls are versatile hunters. Rabbits and hares make up the bulk of their diet, but they also catch hedgehogs, rats, ducks, crows, and other medium-sized birds. They are powerful enough to take young foxes and even other birds of prey. Prey is caught at night using sharp eyesight and acute hearing, then gripped with talons capable of exerting considerable crushing force.
How big is an eagle owl?
The eagle owl is one of the largest owls in the world. Its wingspan can reach up to 188 centimetres, and the biggest females can weigh as much as four kilograms. That makes it heavier than most hawks and buzzards. Despite this impressive size, it flies almost silently thanks to soft fringes on its flight feathers that muffle the sound of air passing over the wing.
Where does the eagle owl live?
This owl has one of the broadest ranges of any bird, stretching from Spain and Portugal across Europe, Russia, and Central Asia all the way to China and the Korean Peninsula. It adapts to a wide variety of habitats, including rocky gorges, forests, open steppe, and mountain slopes. The one thing it always needs is a cliff, rock face, or steep embankment where it can nest.
Is the eagle owl endangered?
No. The IUCN lists the eagle owl as Least Concern. Populations across Europe actually collapsed during the 1800s and early 1900s due to heavy persecution by hunters and gamekeepers, but legal protection from the 1970s onward allowed numbers to recover. Reintroduction programs in Germany, Switzerland, and other countries helped speed the process. The main threats today are collisions with vehicles and powerlines, and poisoning from rodenticides.
Can an eagle owl turn its head all the way around?
Not quite all the way, but close. Eagle owls can rotate their heads up to 270 degrees. This is necessary because their eyes are fixed in their sockets and cannot move at all. To look in a different direction, they have to turn their entire head. Those vivid orange eyes are extremely sensitive to low light, which makes them highly effective hunters during the night.
How long do eagle owls live?
In the wild, eagle owls regularly live for more than 20 years, which is a long lifespan for a bird. In captivity, where they face no predators and receive regular food and veterinary care, individuals have been known to reach over 60 years of age. Their longevity in the wild depends largely on avoiding powerline collisions and other human-related hazards, which are the leading causes of death today.
How does the eagle owl sound?
The male produces a deep, resonant "oo-hu" call that can travel several kilometers on a calm night. The female has a slightly higher version of the same call, and pairs often duet together. Calling is most frequent between December and February, when pairs are strengthening their bond before the breeding season. When threatened up close, eagle owls snap their bills loudly and spread their wings to look as large as possible.