Zebra

The most common and widespread zebra species, a grazing horse with vivid black-and-white striping that lives in family bands across the African savanna.

Three species, six subspecies

What’s commonly called “zebra” is actually three distinct species:

Plains zebra (Equus quagga) — most common; thinner stripes that fade into “shadow stripes.”
Mountain zebra (Equus zebra) — confined to South Africa and Namibia; intermediate stripe count.
Grévy’s zebra (Equus grevyi) — largest and rarest; thin closely-spaced stripes; northern Kenya and Ethiopia.

Each looks distinct enough that experienced field workers identify the species at a glance.

Why the stripes?

The function of zebra stripes is one of evolutionary biology’s stubborn debates. Multiple hypotheses, often each with partial support:

Predator confusion — stripes break up the outline, especially in motion against grass and dappled light.
Thermoregulation — black and white stripes generate convective air currents that may cool the body.
Social signaling — stripes are individually distinctive, and zebras can recognize each other by pattern.
Insect deterrent — biting flies (especially tsetse and horseflies) have unusual difficulty landing on striped surfaces. Studies in 2014 and 2019 strongly support this hypothesis; populations of zebras with the most stripes correlate with regions of highest fly density.

The current consensus leans heavily toward insect deterrence as the primary driver, though no single explanation accounts for everything.

Each pattern is unique

Like human fingerprints, every zebra’s stripe pattern is unique. Foals appear to imprint on their mothers’ patterns within hours of birth, allowing them to find their mothers in the chaos of a fleeing herd. Researchers identify individual zebras photographically using the same patterns.

Difficult to domesticate

Despite repeated attempts over two centuries — including 19th-century British Army experiments and Lord Walter Rothschild’s notorious zebra-drawn carriages — zebras have resisted domestication. Several characteristics work against them:

Aggressive temperament — zebras bite hard and don’t release; injuries to humans are common.
Strong fight-or-flight reflex — easily panicked, with poor recall of training.
No single dominant herd structure — domestic horses follow lead horses; zebras don’t quite work that way.

A handful of trained-zebra novelties exist, but no breeding population of domesticated zebras has ever been established.

A nearly-extinct cousin

The quagga — a brown-and-white striped equid native to South Africa — was hunted to extinction in the 1880s. Genetic analysis later showed quaggas were actually a subspecies of plains zebra, not a separate species. The Quagga Project, started in 1987, has been selectively breeding plains zebras for reduced striping in an attempt to revive the lost phenotype.