Do Ostriches Really Bury Their Heads in the Sand?
False. Ostriches do not bury their heads in the sand. An ostrich that buried its head would suffocate and be unable to see predators — neither makes evolutionary sense. The myth likely originates from the ostrich's behaviour of turning or tending eggs in the ground and occasionally resting their heads on the earth, which from a distance resembles head-burial.
"Ostriches Bury Their Heads in the Sand" is a myth. The scientific consensus is clear, the primary sources are documented above, and the exact origin of the false belief can be traced. Read on for the full evidence.
"Ostriches Bury Their Heads in the Sand"
False.
Head in the sand like an ostrich — the phrase is so embedded in language as a metaphor for wilful ignorance that it feels like established natural history. It is not. Ostriches do not bury their heads in the sand when frightened or threatened. An animal that buried its head in sand would suffocate and would be completely unable to see approaching predators — both fatal outcomes that would make the behaviour an immediate evolutionary failure. No naturalist who has studied ostriches in the field has observed the behaviour. The myth appears to have multiple origins, all based on the misinterpretation of real ostrich behaviours seen from a distance.
What Ostriches Actually Do
Ostriches are ground-nesting birds. The female deposits eggs in a shallow pit scraped in the ground, and both male and female ostriches periodically lean forward over the nest, rotating and turning the eggs with their beaks. Observed from a distance across open savanna — where ostriches naturally live — this behaviour could plausibly appear to be the bird inserting its head into the ground. Ostriches also lie flat on the ground in a defensive posture when threatened — pressing their long necks to the earth to reduce their profile and make themselves less visible. This 'playing dead' or camouflage posture similarly places the head near or on the ground. The birds' colouring provides camouflage in dry grassland, so a crouching ostrich with its neck stretched along the ground can be difficult to see from a distance, and the visible part — the lowered head near the ground — could appear from a distance to be buried. Additionally, ostriches do sometimes eat gravel (for digestive grit) and probe the ground with their beaks, producing momentary head-lowering behaviour. None of these involve actual burial of the head in sand.
The Ancient Origin of the Myth
The head-burying myth has ancient roots. Pliny the Elder, the Roman natural historian writing in the first century AD, described ostriches hiding their heads and necks among bushes, apparently believing they were fully concealed. Pliny attributed this to foolishness, linking the belief that concealing the head meant the whole body was hidden — a characterisation that has persisted into the modern idiom. While Pliny was an important compiler of natural knowledge, his accuracy was highly variable and he relied heavily on second-hand reports from traders and travellers rather than personal observation. His description of ostrich behaviour appears to be a misinterpretation of the egg-tending or ground-resting behaviours described above. The phrase entered Latin literature and subsequently European languages, where it persisted as a proverbial expression long after naturalists in Africa had time to observe real ostriches and found no evidence of head-burial.
Ostrich Actual Defences
Real ostrich defensive and anti-predator behaviour is considerably more impressive than head-burial. Ostriches are among the fastest running land animals, reaching speeds of up to 70 km/h and sustaining 50 km/h over long distances — fast enough to outrun most predators in their habitat. When cornered, ostriches can deliver powerful forward kicks with their two-toed feet. Their primary claw can be 10 cm long, and a kick from an adult ostrich generates sufficient force to kill a lion. This is not the defensive repertoire of an animal that responds to threats by hiding its head. Ostriches also have excellent long-range vision — their eyes are approximately 5 cm in diameter, among the largest of any land animal — which allows them to detect predators at great distances across their open habitat. Their actual defence strategy is distance and speed, with formidable kicking as a last resort. Neither strategy is consistent with the head-in-sand myth.
The Verdict
Ostriches do not bury their heads in the sand. The behaviour is biologically implausible (it would cause suffocation and eliminate the ability to detect predators) and has never been documented by field ornithologists studying wild ostriches. The myth originates from the misinterpretation of real behaviours — egg tending, defensive ground postures, and beak-to-ground probing — observed from a distance across open terrain. The written myth can be traced to Pliny the Elder in the first century AD. Real ostrich anti-predator behaviour consists of fast running (up to 70 km/h), excellent long-range vision, and powerful kicks capable of killing large predators.
Other Animal Myths Debunked by the Same Logic
The ostrich myth illustrates a broader pattern: behaviours that would be biologically self-defeating are almost never real. Evolution is a powerful filter — behaviours that consistently result in suffocation or death are eliminated rapidly. The 'head in sand' behaviour would be selected against in any environment where predators exist, which is the entire range of the ostrich. Similar logic applies to other widespread animal myths. Lemmings do not commit mass suicide by jumping off cliffs — this myth was invented and popularised by a 1958 Disney documentary that staged footage of lemmings being pushed off a cliff. Mother animals do not reject offspring that have been touched by humans — the olfactory detection required is absent in most species. Goldfish do not have three-second memories — controlled studies show they can retain learned behaviours for months. In each case, the myth describes behaviour that would be dramatically counterproductive from a survival standpoint, which should trigger scepticism before the myth is accepted. Animals, shaped by millions of years of selection pressure, almost never do things that reliably get them killed.
Primary Sources
- [1] Deeming, D. C. (1999). The Ostrich: Biology, Production and Health. CAB International. ↗ Source
- [2] Pliny the Elder (77). Naturalis Historia (Natural History). Penguin Classics (translated edition). ↗ Source
- [3] Bertram, B. C. R. (1992). The Ostrich Communal Nesting System. Princeton University Press. ↗ Source
Frequently Asked Questions
Do ostriches actually bury their heads in the sand?
No. This has never been observed by field naturalists. An ostrich that buried its head would suffocate and be unable to see predators — both fatal outcomes that would be eliminated by natural selection immediately.
Where does the ostrich head-burying myth come from?
It appears to originate from Roman natural historian Pliny the Elder (1st century AD), who described ostriches hiding among bushes. Real behaviours — egg tending (leaning over ground nests), defensive ground postures, and ground probing for grit — probably appeared like head-burial from a distance.
What do ostriches actually do when threatened?
They run — at up to 70 km/h, faster than most predators. When cornered, they kick with powerful legs armed with large claws capable of killing a lion. They also have excellent long-range vision to detect threats early.
Why do ostriches lower their heads to the ground?
For egg tending (rotating eggs in ground nests), defensive camouflage postures (pressing the long neck to the ground to reduce profile), and picking up grit for digestion. From a distance, any of these could be misread as head-burial.
Is the ostrich the largest bird in the world?
Yes — the common ostrich (Struthio camelus) is the largest living bird species, reaching up to 2.8m tall and 156kg. It is also the fastest running bird and lays the largest eggs of any living bird species.
Are there other animals with myths about self-defeating behaviour?
Yes — lemmings supposedly jump off cliffs (staged in a 1958 Disney documentary), goldfish supposedly have 3-second memories (false — they retain learned behaviours for months), and mother birds supposedly reject chicks touched by humans (false — most birds can't smell human scent).
Can an ostrich kill a human?
Yes. Ostriches have killed people. A forward kick with the primary claw can cause serious lacerations and blunt force trauma. They are considered dangerous in captivity and should not be approached without appropriate caution.
How We Verified This Claim
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For this myth — Ostriches Bury Their Heads in the Sand — we reviewed the cited primary sources above, cross-referenced against independent scientific literature, and confirmed the verdict with the consensus position of relevant professional bodies (including the sources listed). The claim was then fact-checked against the SmartAss Facts database of over 5,000 verified facts to identify related content.
If you believe our verdict is incorrect or you have a more recent primary source that changes the analysis, the science always wins — we revise pages when the evidence warrants it. Last reviewed: 2026-05-23.
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