Hyena Facts: Four Species, One Bad Reputation

• "Hyena" is a family, not a species. Hyaenidae has exactly four living members: the spotted hyena (Crocuta crocuta), the striped hyena (Hyaena hyaena), the brown hyena (Parahyaena brunnea) and the aardwolf (Proteles cristata).
• The smallest hyena is an insect specialist. The aardwolf eats almost nothing but termites of the groups Trinervitermes and Hodotermes, licking up as many as 300,000 in a single night with a flat, sticky tongue.
• Females often outweigh males. Spotted hyena adults run 40–86 kg (88–190 lb), and females often weigh more than males — unusual among large carnivores.
• Dominance is bought with allies, not muscle. Female dominance in spotted hyenas tracks social support rather than body size or sex: whichever animal had more potential allies won one-on-one interactions, irrespective of body mass and sex. The study did not measure hormones, so it neither confirms nor rules out an androgen contribution. Females hold the advantage largely because males disperse from their birth clan and lose their social network in the process.
• Birth goes through the clitoris, and it is lethal. Female spotted hyenas mate and give birth through an elongated, penis-like clitoris. UC Berkeley researchers reported that over 60 percent of first-born cubs, and up to 10 percent of first-time mothers, die during that first delivery.
• Cubs are born armed and looking around. Spotted hyena cubs arrive with their eyes already open and their milk teeth fully erupted, unlike the blind, helpless newborns of most carnivores — and twins, born roughly an hour apart, can direct aggression at each other from very early on.
• Sibling starvation is a real mechanism, not a routine event. A dominant cub can monopolise the milk and starve its twin, and the first-born holds an early advantage. But the frequency is highly site-dependent: in the prey-rich Ngorongoro Crater, aggression between twins is usually very low, and the long-running study there has never observed a cub starving because of sibling rivalry.
• Rank is inherited from the mother, then males hand it back. Cubs of both sexes inherit their mother's rank in the clan hierarchy. After puberty most males leave their natal clan to find mates, and lose that rank in the process.
• Keepers cannot sex a hyena by looking. The external genitalia of females so closely resemble those of males that a blood test is needed to verify the sex of the animal.
• The giggle is a data-rich signal. Acoustic analysis shows the laugh encodes the caller's age, individual identity and whether it is dominant or subordinate. Pitch drops as a hyena gets older.
• The whoop travels 5 km. The spotted hyena's long-range call can be heard up to 5 km (about 3 miles) away, and each animal's whoop carries an individual signature — but not a clan-wide one.
• Clans are matrilineal and elastic. Spotted hyenas live in matrilineal clans of roughly 8 to 80 animals, built from related female lines plus unrelated immigrant males; clan size tracks prey density, from about 8 in the southern Kalahari to 55–75 in the prey-rich Serengeti.
• They are predators that also scavenge. Studies indicate spotted hyenas kill up to 95 percent of what they eat, and a single hyena can take prey of up to about 18 kg (40 lb) on its own. That 95 percent is the top of a range, not a universal number: the hunted-versus-scavenged split swings by site and prey density, and where prey is scarce hyenas scavenge more. The Ngorongoro Hyena Project states that hyenas there hunt most of their food themselves.
• The gut processes the entire carcass. Skin, hooves, ligaments, horns, hair and bone all go down. What cannot be digested comes back up as pellets, much like an owl's.
• Bone-cracking has evolved only three times, and hyenas are the last ones standing. All three groups of bone-cracking carnivorous mammals converged on robust teeth, a vaulted forehead and a pronounced sagittal crest. In hyenas that crest is hollow — pneumatised by an elongated frontal sinus that spreads the stress of the bite.
• Primate-level societies, patchier puzzle-solving. Spotted hyena societies are as socially complex as many primates', and when researchers put a novel steel puzzle box in front of 62 wild hyenas in Kenya's Masai Mara, a minority worked out how to open it — success was predicted by how many different exploratory behaviours an individual tried, not by its social rank.
• Ice Age Europe had its own hyena. The cave hyena, Crocuta crocuta spelaea, ranged across Eurasia. A 194-bone partial skeleton from Los Aprendices Cave in northern Spain came from an animal weighing roughly 227 pounds — heavier and more powerful than living spotted hyenas.
• One species is sliding fast. The striped hyena is the family's most-declining member: IUCN lists it as Near Threatened, with a global population the Wildlife Conservation Society estimates at fewer than 10,000 mature individuals and still falling. At the CMS CoP15 meeting in Campo Grande, Brazil, at the end of March 2026, governments granted it dual Appendix I and Appendix II listing.

"Hyenas are a kind of wild dog." They are feliforms — on the cat branch of the carnivore tree. A hyena is more closely related to a mongoose or a civet than to any dog. The doglike build is convergent evolution, two unrelated lineages arriving at the same shape for the same job.

"Hyenas are hermaphrodites, or switch sex from year to year." Every spotted hyena is one sex for life. The confusion comes from the female's anatomy: an elongated, erectile clitoris that looks like a penis, flanked by fused labia filled with fatty tissue that pass for a scrotum.

"Hyenas are cowardly scavengers that live off lion kills." It runs the other way. In the Ngorongoro Crater, lions steal kills from hyenas more often than hyenas steal from lions, and hyenas hunt most of their own food. Hyenas can only take a carcass off lions when the lions are females or young males and the hyenas outnumber them roughly six to one; against an adult male lion they always lose. Lions are the leading cause of death for Crater hyenas.

"Hyenas laugh because they're amused, or to mock their prey." The giggle is a stress and frustration call. Hyenas produce it when they are losing — mobbed off a kill by lions, or squabbling with a higher-ranking clan mate over a carcass. In the Berkeley study that decoded it, researchers reliably triggered giggling by holding a bone just out of an animal's reach.

"The hyena has the strongest bite in the animal kingdom, measured at 1,100 PSI." That number is far shakier than the internet suggests. Most estimates of spotted hyena bite force land between 500 and 1,000 newtons; the enormous 4,500-newton figure that gets recycled traces to a single animal measured in the year 2000. Very few carnivore bite forces have ever been directly measured, and nearly all of those came from captive animals, which researchers note almost certainly understate what wild animals can do. The defensible claim is the one zoos actually make: the hyena's jaws are the most powerful in proportion to body size of any mammal.

Disney shaped the modern hyena more than any documentary. In The Lion King (1994), the trio Shenzi, Banzai and Ed — voiced by Whoopi Goldberg, Cheech Marin and Jim Cummings — are Scar's dim, cackling henchmen, skulking in an elephant graveyard on the wrong side of the Pride Lands. Disney returned to them in a photoreal remake in 2019.

The portrait is close to a point-by-point inversion of the animal. The film's hyenas are muscle for a lion; the Ngorongoro data has lions stealing kills from hyenas more often than the reverse. They are drawn as bumbling and dim; wild hyenas run societies as socially complex as many primates'. They cackle when they are pleased with themselves; a real giggle means the animal is stressed, frustrated or losing a fight over food. And the henchmen framing misses the one detail a scriptwriter might actually have used: a spotted hyena clan is run by females, and rank passes down the female line.

That is the cost of a good villain design. The elephant-graveyard hyena is now the default mental image, which is why almost every myth on this page needs debunking twice — once for the folklore, once for the film.

Hyenas have no celebrity individuals in the way lions or gorillas do. The named ones — Shenzi, Banzai, Ed — are cartoons. The genuinely well-known hyenas are research animals, and they are the reason almost everything on this page can be stated at all.

The clans of the Ngorongoro Crater in Tanzania, followed for decades by the Ngorongoro Hyena Project at the Leibniz Institute for Zoo and Wildlife Research, are the best-documented hyenas alive. They are the source for the twin-rivalry work — including the finding that in all those years of watching, no cub there has been observed starving because of a sibling — and for the reversal of the scavenger story, since it is in the Crater that lions were recorded stealing more kills from hyenas than hyenas took from lions.

Then there are the 62 wild hyenas of Kenya's Masai Mara, presented with a steel puzzle box they had never seen before; the minority that cracked it were the ones that tried the widest range of exploratory behaviours, not the highest-ranking animals. And there is the captive colony at UC Berkeley, whose giggles were recorded, played back and decoded into age, identity and rank, and whose births produced the grim reproductive numbers — over 60 percent of first-born cubs and up to 10 percent of first-time mothers dying at that first delivery.

The oldest famous hyena is a fossil. A 194-bone partial skeleton of a cave hyena, Crocuta crocuta spelaea, recovered from Los Aprendices Cave in northern Spain — a site dated between roughly 143,000 and 38,000 years ago — came from an animal of about 227 pounds, heavier and more powerful than any spotted hyena on the plains today.