Zebra Facts & Trivia: Stripes, Migration and the Quagga

• The longest pregnancy of any equid. A Grévy's zebra mare carries her single foal for 390 days.
• A foal is walking about twenty minutes after birth and can run within the hour.
• They reach more than 40 mph (64 km/h).
• Grévy's zebra has the largest ears of any zebra, set on a long, narrow, almost mule-like head.
• Adults can go three to five days without drinking — nursing mothers excepted — and will forage up to 22 miles (35 km) from the nearest water even in the dry season.
• Grévy's zebra is in serious trouble. Surveys in the 1970s put the population at as many as 15,000. Fewer than 2,500 remain: under 100 in Ethiopia and under 2,400 in Kenya.
• It is named after a French president. Jules Grévy was sent a live one in 1882 as a diplomatic gift from Emperor Menelik II of Abyssinia.
• They once ranged to Egypt, around 6,000 years ago in the Neolithic.
• The longest straight-line land migration documented in Africa is a zebra's: more than 300 miles (500 km) between Namibia and Botswana, discovered by satellite collar in 2012 and published in Oryx in 2014. It is the longest endpoint-to-endpoint journey, not the greatest total distance walked — the Serengeti migration covers more ground overall.
• The plains zebra is a hindgut fermenter, which lets it live on grass far too coarse and poor for the ruminants sharing the same savannah.
• Mountain zebras are identifiable from behind by a gridiron of narrow horizontal bars across the rump, and a dark stripe running the length of the white belly.
• The Cape mountain zebra fell to fewer than 50 animals in three surviving pockets by the 1950s, after a 90% collapse in its range.
• Ancient DNA as a field began with a zebra. In 1984 researchers recovered two short mitochondrial sequences from a museum specimen of the extinct quagga — the first time DNA had been retrieved from an extinct animal.
• The quagga's half-striped, brown-rumped coat evolved unusually fast, from a lineage that split from other plains zebras only about 120,000–290,000 years ago. Genetically the quagga sits inside the living plains zebra rather than beside it, so it was a lost population, not a lost species.

"White with black stripes." Under the coat the zebra is a dark animal: the skin is uniformly dark and the white bands are where pigment production is switched off in the hair. The argument is about which colour is the default, and the default is black.

"The stripes are camouflage." Researchers passed zebra photographs through digital filters mimicking lion and hyena vision. Big cats cannot resolve the stripes at any useful range — beyond roughly 50 m in daylight, 30 m at dusk and about 9 m on a moonless night the pattern collapses into flat grey. By the time a lion can see stripes it can see a zebra.

"The stripes are air conditioning." Tested directly: six water-filled metal barrels were covered with real horse, cattle and zebra hides, plus an artificial striped pattern, and measured in the field. The striped barrels ran no cooler. A 2019 study revived a narrower version of the idea, so it is not entirely closed — but the simple cooling-eddy story failed its test.

"Zebras were never tamed because they are vicious." That is Jared Diamond's checklist, and when domestication was modelled against ungulate phylogeny, temperament predicted nothing. What did predict it was capture myopathy — the fatal muscle and heart damage some animals suffer from panic and overexertion.

"Zebras lead the migration and mow the tall grass for the wildebeest behind." Grazing succession was taught for decades. A 2024 study combining camera traps, GPS collars, diet analysis and satellite data found the head of the procession is a competition for the same nutritious parts of the tall grass, not a relay of favours.

The zebra crossing takes its name from the animal and dates to British road trials of 1949. DreamWorks put Marty the zebra at the centre of Madagascar (2005) and its sequels, and gave Racing Stripes (2005) a zebra that thinks it is a racehorse. In medicine, "zebra" is student slang for a rare diagnosis, from Theodore Woodward's aphorism that when you hear hoofbeats you should think horses, not zebras — which is why rare-disease campaigns have adopted the stripe as their symbol.

The best-known individual zebra is the one Jules Grévy received in 1882, a diplomatic gift from Emperor Menelik II of Abyssinia that ended up naming the species.

The most consequential, though, is a museum skin. The quagga specimen sampled in 1984 yielded the first DNA ever recovered from an extinct animal and effectively started the field of ancient DNA — the same discipline that has since rewritten the histories of the mammoth, the Neanderthal and, as it happens, the domestic cat.