Plains Zebra — facts, diet, habitat & conservation

The plains zebra is the striped horse of the African savanna — the one on the documentaries, migrating across the Serengeti in vast mixed herds with wildebeest. It is also a lesson in why “looks like a horse” does not mean “acts like a horse.”

Overview

Plains zebras are the most numerous and widespread of the three zebra species, grazing the grasslands of eastern and southern Africa. They are water-dependent and rarely stray more than 10–12 km from a drink, which shapes their movements through the dry season. Where rainfall is seasonal they undertake long migrations, including a round trip between Namibia and Botswana that is the longest land migration of any African mammal.

The stripes

No two zebras have the same stripe pattern, and researchers use the pattern like a fingerprint to identify individuals. What the stripes are for was debated for over a century, and the current leading explanation is surprisingly mundane: biting flies avoid them. Experiments with striped and plain horse coats show that tsetse flies and horseflies — which spread lethal diseases — fail to decelerate properly as they approach stripes and mostly bounce off or veer away. Cooling, camouflage, motion dazzle in a running herd, and social recognition may each contribute a little, but none explains the pattern as well as fly deterrence.

Herd life

Plains zebra society is built on the harem: a single stallion, a stable group of two to six mares, and their dependent foals. Mares keep a strict rank order, and the whole family moves, feeds, and flees as a unit. Young stallions leave to join bachelor groups until they can win or found a harem of their own. Several harems and bachelor groups often travel together in loose herds that offer more eyes to watch for lions and hyenas.

Zebras groom each other by nibbling along the neck and back, reinforcing bonds, and a harem under attack will form a defensive cluster with the stallion at the rear, kicking.

Diet

Zebras are pioneer grazers. Their digestive system tolerates coarse, low-quality grass that ruminants like wildebeest cannot use efficiently, so zebras often move into fresh grassland first, crop the tall tough stems, and leave the shorter, more nutritious regrowth for the animals that follow. This is one reason zebras, wildebeest, and gazelles can share the same plains.

Reproduction and life cycle

A single foal is born after a 12–13 month pregnancy, already striped (brown and white at first), and can stand and run within an hour — essential on the open plains. The mother keeps other zebras away for the first few days so the foal imprints on her scent, stripe pattern, and call. Foals are weaned at around a year and reach independence soon after.

Threats and conservation

The plains zebra is Near Threatened and declining. The pressures are the same ones squeezing large grazers across Africa:

Fences, farmland, and roads that fragment the range and cut the migration corridors zebras rely on to reach seasonal grazing and water.
Hunting for meat and skins, legal in some places and poached in others.
Drought and competition with livestock for grass and water.

Populations are stable or growing in large, well-connected protected areas but have vanished from Burundi and Lesotho and crashed in several other countries.

Plains Zebra: common questions

What are a zebra's stripes for?

The best-supported answer is insect control. Biting flies such as tsetse flies and horseflies, which carry deadly diseases, struggle to land on striped surfaces — the pattern seems to disrupt their vision as they approach. Other suggested benefits, like confusing predators in a moving herd, keeping cool, or helping zebras recognise each other, may play a smaller role.

Is a zebra black with white stripes or white with black stripes?

Black with white stripes. A zebra's skin is black, and the default state of its coat is dark; the white stripes are areas where pigment is switched off during development. Embryos start out uniformly dark and the stripes appear later.

Why can't zebras be domesticated like horses?

Several reasons. Zebras have a weak social hierarchy, so there is no "lead animal" for a human to substitute for, as with horses. They are more skittish and aggressive, with a powerful kick and a bite they do not let go of, and they lack the calm temperament that made horses and donkeys tameable. Attempts to ride and harness zebras have mostly ended in injury.

Are zebras endangered?

The plains zebra is listed as Near Threatened, with numbers down roughly a quarter as fences, farms, and roads cut across their range and block the seasonal movements they depend on. Two other zebra species — the Grévy's and the mountain zebra — are in worse shape.