Hoofed mammals are generally housed in the center of the zoo. Hoofed mammals at the Denver zoo (clockwise from the entrance) are Grevy's zebras, reticulated giraffes, Bactrian camels, okapis, Somali wild asses, a Vietnamese potbellied pig named Charlie, a variety of antelope species including eastern bongo, addax, lesser kudu and southern gerenuk, as well as Cape buffalo. Denver Zoo is also one of only a few zoos in the world to house a breeding herd of Przewalski's horses. Other species exhibited in the hoofed mammal yards include Abyssinian ground hornbills with the kudu, red kangaroos and emus in an Australian habitat and west African crowned cranes with the gerenuk.