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Wonders of the real world

Wonders of owls

Owls (the order Strigiformes)

The real owl

Owls are birds of prey with big, forward-facing eyes and flat faces. Here are three true things about them.

Owls everywhere

There are some 220 to 225 species of owl. They live in all parts of the Earth except the polar ice caps and some remote islands.

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Eyes that stay still

An owl's eyes are shaped like tubes and fixed in place, so it cannot move them in any direction. Instead it can turn its head and neck as much as 270 degrees, and it has 14 neck bones where people have seven.

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Quiet wings

Most owls can fly almost silently. Saw-toothed edges on their wing feathers soften the sound of each wingbeat, and a velvety surface on the feathers soaks up sound.

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A barn owl with a pale heart-shaped face flying low over a grassy meadow at dusk.

A barn owl hunting low over a meadow at dusk

Hunting by ear

How an owl listens

Many owls have a circle of feathers around each eye, called a facial disc. The disc helps funnel the sound of prey to the owl's ears, and the owl can adjust its feathers to focus sounds from near or far. In some owls, the two ears are set at different places on the skull. A sound reaches the two ears at very slightly different times, and that tells the owl which direction it came from. Owls are farsighted, too. They cannot clearly see anything closer than a few centimetres from their eyes. They feel prey they have caught with hair-like feathers on the beak and feet.

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Owl clues

Hard to see, easy to study

An owl's feathers help it sit still and blend into its surroundings, so prey can hardly see it. Many owls match the colours, and sometimes the patterns, of the places they rest. Often the only sign that an owl is there is its call or its brightly coloured eyes. But owls leave clues. An owl brings back up the parts of its prey it cannot digest, such as bones, scales and fur, packed into a lump called a pellet. Owl pellets are common and easy to study, and they are often sold to schools for pupils to take apart in biology lessons.

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Three remarkable owls

A tiny grey-brown owl with yellow eyes looking out of a hole in a tall cactus.

An elf owl looking out of its hole in a cactus

Elf owl

Micrathene whitneyi

The elf owl is the world's smallest and lightest owl, about 12.5 to 14.5 centimetres long. It often nests in old woodpecker holes in saguaro cacti and eats mainly insects. It has been seen removing a scorpion's sting before eating it.

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A white owl with yellow eyes standing on the open Arctic tundra in summer.

A snowy owl on the Arctic tundra in summer

Snowy owl

Bubo scandiacus

The snowy owl lives in the Arctic and is the only owl with mainly white feathers. Most owls hunt at night, but the snowy owl is often active during the day, especially in summer.

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A small long-legged owl with yellow eyes standing at the mouth of its burrow in dry grassland.

A burrowing owl at the mouth of its burrow

Burrowing owl

Athene cunicularia

This small, long-legged owl of North and South America lives in burrows, often ones dug by ground squirrels or prairie dogs. When threatened, it goes into its burrow and makes rattling, hissing sounds like a rattlesnake.

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The pictures on this page are AI-generated illustrations. The facts are checked against the sources linked.