The okapi is the only living close relative of the giraffe and is native to the dense rainforests of the Democratic Republic of the Congo. Adults usually weigh about 440–770 pounds, with females often slightly larger or heavier than males. Okapi have dark chocolate-brown bodies, zebra-like white striping on the legs and rump, large ears, and a long prehensile tongue; males have short skin-covered horns called ossicones. They are shy, solitary forest browsers that feed on leaves, shoots, fruits, and fungi. Okapi were introduced into U.S. zoos during the 20th century and are managed primarily as conservation animals, not ranch livestock.