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Masai ostrich male, Serengeti National Park, Tanzania

Animal

Common ostrich

The ostrich is the biggest bird in the world. It cannot fly, but it can run very, very fast on its long legs.

The common ostrich is the tallest and heaviest bird alive. It cannot fly, but it is the fastest runner on two legs, sprinting at about 70 kilometers an hour across the savannas and deserts of Africa. It also lays the biggest egg of any living animal.

Struthio camelus is the largest living bird, a flightless runner of African savannas, grasslands, shrublands and semi-deserts. Long, two-toed legs make it the fastest bipedal animal, while its huge eyes, communal nests and ability to go long periods without drinking suit it to open, dry country. Its range has shrunk greatly, and some northern populations are critically low.

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Photo: Charles J. Sharp, CC BY-SA 4.0, via Wikimedia Commons

Meet the ostrich

The ostrich is the biggest bird on Earth.

It is taller than a grown-up. It has a long neck, long legs and big eyes with long eyelashes. Daddy ostriches are black and white. Mommy ostriches are brown.

The common ostrich is the tallest and heaviest bird in the world. A big male can stand up to 2.7 meters tall with his head up, much taller than a grown-up, and weigh up to 130 kilograms.

It is far too heavy to fly. Instead it is built for running. Adult males have black feathers with white wings and tail, while females and young birds are grayish brown. Its long eyelashes help keep out dust and sand.

Struthio camelus is the largest and heaviest living bird. San Diego Zoo Wildlife Alliance gives heights of 1.7 to 1.9 meters for females and 2.1 to 2.7 meters for males, and weights of 90 to 130 kilograms. Its species name, camelus, recalls its old name of 'camel bird', given for its long neck, prominent eyes, sweeping eyelashes and jolting walk; like a camel, it tolerates heat and can go long periods without water.

San Diego Zoo lists four subspecies: the red-necked or North African ostrich, the Somali ostrich, the Masai ostrich (the bird in our photo) and the South African ostrich. The IUCN assesses the Somali ostrich separately, as Struthio molybdophanes.

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Masai ostrich male, Serengeti National Park, Tanzania
Photo: Charles J. Sharp, CC BY-SA 4.0, via Wikimedia Commons

Quick facts

Group
Bird
Height
1.7 to 2.7 m
Weight
90 to 130 kg
Top speed
up to 70 km/h
Lifespan in the wild
30 to 40 years

Where it lives

Ostriches live in Africa.

They walk across wide, grassy plains and dry, sandy places. They live near zebras, giraffes and gazelles.

Wild ostriches live in Africa, in open places where they can see far: savannas, grasslands, dry shrublands and the edges of deserts. They often feed alongside zebras, giraffes, wildebeest and gazelles.

Long ago ostriches lived over most of Africa and even in the Middle East. Today wild ostriches survive in about two dozen African countries, mostly in eastern and southern Africa, with much smaller, scattered groups in North Africa and the Sahel.

The IUCN's 2025 global assessment lists the common ostrich as resident in 26 African countries, from Mauritania, Senegal and Mali across the Sahel to Sudan and Ethiopia, and through East Africa to Namibia and South Africa; it is extinct in Libya, and introduced populations live in Australia and Eswatini.

The species uses open savanna, grassland, shrubland and semi-desert up to about 3,000 meters. San Diego Zoo notes that ostriches once lived across most of Africa; the Arabian subspecies became extinct in the 1960s, and the Smithsonian's National Zoo describes the North African ostrich as critically endangered.

Continent

Where can you find this animal?

  • Used to live here · Countries and seas named by a scientific source
  • Brought here by people · Countries and seas named by a scientific source
  • Lives here naturally · Countries and seas named by a scientific source
  • Sightings recorded · Records of wild sightings (GBIF)
Used to live here · Countries and seas named by a scientific source

The IUCN lists the ostrich as extinct in Libya.

Places: Libya.

Source: iucn-red-list · checked October 2026

Brought here by people · Countries and seas named by a scientific source

Ostriches brought by people now live wild in parts of Australia and in Eswatini.

Places: Australia and Eswatini.

Source: iucn-red-list · checked October 2026

Lives here naturally · Countries and seas named by a scientific source

Savannas, grasslands, shrublands and semi-deserts of Africa. Most ostriches live in eastern and southern Africa; in the Sahel and North Africa only small, scattered groups remain. Ostriches live in only part of each country shown.

Places: Algeria, Angola, Botswana, Cameroon, Central African Rep., Chad, Ethiopia, Eritrea and 18 more places.

Source: iucn-red-list · checked October 2026

Sightings recorded · Records of wild sightings (GBIF)

Counts of GBIF records of wild observations (human and machine) and preserved specimens. Records include introduced populations, vagrants, escaped or released animals and misidentifications, so a country with records is not necessarily part of the native range.

Wild sightings have been recorded in South Africa, Kenya, Namibia, Tanzania, Botswana, Zimbabwe, Australia, Uganda and 63 more places.

Source: gbif · checked October 2026

Range maps show where scientists say an animal lives, often country by country. An animal may live in only part of a country shown, and sightings records can include animals that wandered far from home.

What it eats

Ostriches eat mostly plants.

They eat leaves, roots, seeds and flowers. Sometimes they eat bugs and lizards. They swallow little stones to help mash their food.

Ostriches are omnivores, but most of what they eat is plants: roots, leaves, seeds, grasses, flowers and succulents. Now and then they snap up insects such as grasshoppers and locusts, or a lizard or mouse.

Ostriches have no teeth. They swallow sand and pebbles, which grind up food in a muscular part of the stomach called the gizzard. They can go a long time without drinking, because they get water from their food.

The diet is mainly plant matter, including roots, leaves, seeds, grasses, flowering plants and succulents, supplemented by insects such as locusts, small reptiles, frogs and rodents. Food collects in the crop until a bolus forms that slides down the neck.

Lacking teeth, ostriches swallow grit and stones that grind food in the gizzard, and San Diego Zoo reports that the intestines stretch to about 14 meters, extracting nutrients from tough plants. Ostriches can meet their water needs from vegetation and can let their body temperature rise on hot days, which reduces water lost to cooling.

Did you know?

Ostriches are the only birds with two toes.

All other birds have three or four toes. Ostriches have just two, which helps them run fast.

The two-toed foot is unique among living birds; San Diego Zoo says it is built for greater speed.

Built to run

An ostrich has two big toes on each foot.

Its long, strong legs help it run super fast. Its eyes are the biggest of any animal on land.

The ostrich is the fastest animal on two legs. It can sprint at about 70 kilometers an hour and keep up about 50 kilometers an hour for a long time. A single stride can be 3 to 5 meters long, longer than many rooms!

Ostriches are the only birds with just two toes on each foot, and each toe ends in a long, sharp claw. Their wings cannot fly, but they help with balance and steering when running and are shown off in displays. Each eye is about 5 centimeters across, the biggest eye of any land animal.

Long, heavily muscled legs and two-toed feet, unique among birds, make the ostrich the fastest biped: San Diego Zoo gives sprints of about 70 km/h, sustained speeds of about 50 km/h and strides of 3 to 5 meters. Each toe ends in a long, sharp claw.

The wings act as rudders and balancers in fast turns, are flapped and fanned to keep cool, and are central to display. Unlike most birds' feathers, ostrich feathers do not hook together, giving the plumage its soft, shaggy look, and ostriches lack the gland many birds use to waterproof their feathers. Their eyes, about 5 centimeters across, are the largest of any land animal.

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How big is it?

Height: 1.7 to 2.7 m (standing, head up; females 1.7 to 1.9 m, males 2.1 to 2.7 m)

Weight: 90 to 130 kg (adults; females 90 to 110 kg, males 100 to 130 kg)

A nest full of giant eggs

Ostriches lay the biggest eggs in the world.

One egg weighs as much as about two dozen chicken eggs. Many mothers lay their eggs in one big nest. The chicks hatch fluffy and can run very soon.

Ostrich eggs are the biggest eggs of any living animal: about 15 centimeters long and 1.4 to 1.5 kilograms, as heavy as about two dozen chicken eggs. Several females lay their eggs in one shared nest, a shallow scrape in the ground, so it can hold dozens of eggs.

The main female usually sits on the eggs by day and the black-feathered male at night. After about 45 days the chicks hatch. They grow about 30 centimeters a month and are nearly adult size at 6 months.

Breeding groups center on a territorial male and a dominant 'main hen'. Other females lay in her nest, a shallow scrape, producing a communal clutch that the National Zoo says may reach 50 eggs; the main hen places her own eggs centrally, where they are most likely to hatch. Each egg averages about 15 by 13 centimeters and 1.4 to 1.5 kilograms, the largest egg of any living animal.

The drab female incubates by day and the black male by night, for about 45 days. Chicks leave the nest within days, grow about 30 centimeters a month, reach adult size at about 6 months and mature at 3 to 4 years, when males gain black plumage.

A female ostrich pecking at green grass with two fluffy striped chicks beside her
Photo: Bernard DUPONT from FRANCE, CC BY-SA 2.0, via Wikimedia Commons

A life, step by step

Ostrich life on the plains

Ostriches live in small groups.

They keep watch for danger with their big eyes. Do ostriches hide their heads in the sand? No! They lie down flat to hide.

Ostriches usually live in groups of about 10 or a dozen birds, sometimes 100 or more. With so many sharp eyes looking out, someone usually spots danger, and then they run.

Ostriches do not bury their heads in the sand. If an ostrich cannot run, it may lie flat with its neck along the ground, and from far away its pale head blends with the soil. Ostriches also lower their heads to turn their eggs, which may be how the story started. In the breeding season, males make deep booming calls and dance by bowing and waving their wings.

Ostriches are diurnal and most active early and late in the day. Groups usually number about 10 to 12, with a dominance hierarchy led by a territorial male and a main hen; aggregations of 100 or more occur. Excellent long-range vision lets groups detect predators early.

The head-in-sand belief is unfounded: threatened birds may lie flat with head and neck on the ground, and nest-tending birds lower their heads to turn eggs. Breeding males inflate a throat sac to produce a deep boom and court by sinking to the ground and waving each wing in turn. When family groups meet, the winning pair may take all the chicks, forming 'nurseries' of up to 300 young.

Did you know?

One ostrich egg is as heavy as about two dozen chicken eggs.

An ostrich egg weighs about 1.4 to 1.5 kilograms, as much as about two dozen chicken eggs.

At about 1.4 to 1.5 kg, the ostrich egg is the largest egg, and the largest single cell, of any living animal.

Ostriches and people

People have kept ostriches on farms for a long time.

Wild ostriches need open land and protection from hunting. Parks help keep them safe.

The common ostrich is listed as Least Concern worldwide, but wild ostriches have declined, mainly because of habitat loss and overhunting. Once they lived over most of Africa; the North African ostrich is now critically endangered.

People have used ostrich feathers for thousands of years. About a hundred years ago, ostrich feather hats were so popular that South Africa had huge feather farms. Today ostriches are still farmed for meat, eggs, leather and feathers.

The IUCN assessed the common ostrich as Least Concern in 2025, but its range has contracted greatly and the Smithsonian's National Zoo describes the North African subspecies as critically endangered and the Arabian subspecies as extinct since the 1960s. Habitat loss and overhunting are the main causes of decline.

Ostrich plumes have been traded since ancient times. In the early twentieth century they ranked fourth among South African exports, and by 1913 more than a million ostriches lived on farms worldwide before the market collapsed. Farming continues on a smaller scale, mainly for feather dusters, eggs, leather and meat, and San Diego Zoo notes that the remaining wild populations need strict protection.

IUCN Red List

How is the common ostrich doing in the wild?

  1. Least Concern (this animal)
  2. Near Threatened
  3. Vulnerable
  4. Endangered
  5. Critically Endangered
  6. Extinct in the Wild
  7. Extinct

Least Concern

Not at risk of disappearing from the wild right now.

See the IUCN Red List assessment · The IUCN Red List of Threatened Species 2021.3

Amazing facts

  • No animal on land has bigger eyes than an ostrich.

    An ostrich's eye is about 5 centimeters across, the largest eye of any land animal.

    San Diego Zoo gives the ostrich eye as almost 5 cm across, the largest of any land animal; the National Zoo calls it the largest of any bird.

  • Ostriches are the only birds with two toes.

    All other birds have three or four toes. Ostriches have just two, which helps them run fast.

    The two-toed foot is unique among living birds; San Diego Zoo says it is built for greater speed.

  • Ostrich chicks can run very fast when they are only a month old.

    A one-month-old ostrich chick can run at almost 56 kilometers an hour.

    San Diego Zoo reports chicks approaching 56 km/h at about one month old.

  • One ostrich egg is as heavy as about two dozen chicken eggs.

    An ostrich egg weighs about 1.4 to 1.5 kilograms, as much as about two dozen chicken eggs.

    At about 1.4 to 1.5 kg, the ostrich egg is the largest egg, and the largest single cell, of any living animal.

Words to know

flightless
not able to fly
communal nest
a nest where several females lay their eggs together
omnivore
an animal that eats both plants and animals
gizzard
a muscly part of a bird's stomach that grinds food
savanna
a warm, grassy land with scattered trees
plume
a long, soft, fluffy feather

Discovery challenge

  1. Can an ostrich fly?

    Can an ostrich fly away from danger?

    Can an ostrich fly, and how does it escape danger?

    • No, but it runs very fast
    • Yes, very high
    • It swims away
    Show the answer

    No, but it runs very fast

    Ostriches cannot fly, but they run super fast.

    It cannot fly, so it runs, sprinting at about 70 kilometers an hour.

    It is too heavy to fly; it escapes by sprinting at about 70 km/h.

  2. How many toes does an ostrich have on each foot?

    How many toes are on each of an ostrich's feet?

    How many toes does each ostrich foot have, a number no other living bird shares?

    • Two
    • Five
    • Ten
    Show the answer

    Two

    An ostrich has two toes on each foot.

    Ostriches are the only birds with just two toes.

    Two, each ending in a long, sharp claw; all other birds have three or more toes.

  3. Do ostriches hide their heads in the sand?

    Do ostriches bury their heads in the sand when they are scared?

    Do ostriches really bury their heads in the sand?

    • No, they lie down flat
    • Yes, every day
    • They climb a tree
    Show the answer

    No, they lie down flat

    No! They lie flat on the ground to hide.

    It may lie flat with its neck on the ground, so it blends with the soil.

    Lying flat when threatened and lowering the head to turn eggs both look like burying from afar.

  4. Who sits on the ostrich eggs at night?

    Which ostrich parent usually sits on the eggs at night?

    Which parent usually incubates ostrich eggs at night?

    • The daddy
    • Nobody
    • A zebra
    Show the answer

    The daddy

    The daddy sits on the eggs at night.

    The black-feathered male usually sits at night, and the brown main hen by day.

    The drab main hen usually incubates by day and the black-plumed male takes over at night.

Places where you might see it

Experiments to try

Explore next

For parents & teachers

What children will learn

  • Describe how the ostrich's legs, feet, eyes and wings suit life in open country.
  • Explain what ostriches eat and how they digest food without teeth.
  • Describe communal nesting and how ostrich parents share the work.
  • Explain how habitat loss and overhunting have reduced wild ostriches.

Recommended ages: 3 to 17 · About 15 minutes

Talk about it

  • Why might it help a bird that cannot fly to have very big eyes?
  • Why might the black male sit on the eggs at night and the brown female by day?
  • How do you think the 'head in the sand' story started?

Try at home or in class

  • Measure 2.7 meters up a wall or along the floor and compare it with your own height.
  • Weigh about two dozen chicken eggs in their boxes, or 1.5 kilograms of rice, to feel the weight of one ostrich egg.

Key vocabulary: flightless, communal nest, omnivore, gizzard, savanna, plume

Where these facts come from

  1. The IUCN Red List of Threatened Species , International Union for Conservation of Nature (IUCN terms of use (no redistribution of Red List data or range maps))
  2. GBIF Backbone Taxonomy and GBIF Occurrence Search , Global Biodiversity Information Facility (CC0 1.0 (backbone); occurrence counts are facts derived from records under CC0, CC BY and CC BY-NC)
  3. Wikidata , Wikimedia Foundation (CC0 1.0)
  4. Struthio camelus (Common Ostrich), Red List global assessment 2025 , IUCN Red List of Threatened Species
  5. Ostrich , San Diego Zoo Wildlife Alliance
  6. Ostrich , Smithsonian's National Zoo and Conservation Biology Institute
  7. Wikimedia Commons , Wikimedia Foundation (Per file: Public domain, CC0, CC BY or CC BY-SA only (credited on each page))

Checked, not yet human-reviewed. Last updated October 28, 2026. Spotted a mistake? Tell us.

Picture and 3D model credits
  • Photo: Charles J. Sharp, CC BY-SA 4.0, via Wikimedia Commons · source · license
  • Photo: Bernard DUPONT from FRANCE, CC BY-SA 2.0, via Wikimedia Commons · source · license
  • 3D model: Stephengury, CC BY 4.0, via Sketchfab · source · license