The okapi was unknown to Western science until 1901, which is remarkable for an animal the size of a horse. It lives in the dense Ituri rainforest of the Democratic Republic of Congo, and the forest hid it so effectively that despite local Mbuti pygmy people knowing it well for centuries, European naturalists heard only rumors and dismissed them as legend until a British explorer finally obtained a skin and sent it to London.
The first scientists to examine the skin thought it was a new species of zebra. The striped hindquarters, the large ears, the general body shape, all pointed toward something equine. Then they looked at the skull and the feet and realized they were looking at the only living relative of the giraffe — and a completely new genus.
The relationship makes sense once you know it. The okapi has the same ossicones, the skin-covered horn-like protrusions on the head, that giraffes have. The tongue is the same extraordinary length, up to 45 centimeters, and the same dark blue-black color, used to strip leaves from branches and to groom the face and ears. The body plan is a shorter, stockier version of the giraffe body plan, adapted for dense forest rather than open savanna. The giraffe stretched its neck to reach the high canopy. It stayed in the forest and stayed low.
The stripes on the hindquarters are not for display. They are for following. The calves follow their mothers through dense forest, and the stripes on the mother’s rump give them a clear visual target to track in low light conditions. The pattern that looks like zebra camouflage is actually a follow-me signal for a calf navigating dark forest — one of the okapi‘s most striking adaptations.
The Secretive Life of the Okapi
Okapis are solitary and extraordinarily secretive, which is part of why they remained unknown to science for so long. Each okapi holds a large home range and avoids others except during mating. They communicate partly through infrasound, low-frequency calls below the threshold of human hearing that carry through dense forest without alerting predators. A forest can be completely silent to human ears, even when these animals are nearby.
The primary predator is the leopard, and okapi behavior is organized around leopard avoidance. They are alert, fast over short distances, and use their large ears to detect sound from multiple directions simultaneously. When threatened, a powerful hind-leg kick — delivered with enough force to injure a leopard — serves as the primary active defense.
The Okapi, the Forest, and the War
The Ituri forest where okapis live has been the site of ongoing armed conflict for decades, and the Okapi Wildlife Reserve, established in 1992 and a UNESCO World Heritage Site, has been repeatedly affected by the presence of armed groups, illegal mining, and poaching. In 2012, armed militia attacked the reserve headquarters, killing rangers and releasing captive okapis. The rangers who protect okapis in the Ituri do so at genuine personal risk.
The okapi population is estimated at between 10,000 and 35,000 individuals, a wide range that reflects how difficult the animals are to survey in dense forest. The trend is downward, and the species is listed as Endangered on the IUCN Red List. The animal that hid from science for so long is now hiding from a different kind of threat, and the forest that concealed it is shrinking.