The bongo (Tragelaphus eurycerus) is a herbivorous, mostly nocturnal forest ungulate. Bongos are characterised by a striking reddish-brown coat, black and white markings, white-yellow stripes and long slightly spiralled horns. Bongos are the only tragelaphid in which both sexes have horns. They have a complex social interaction and are found in African dense forest mosaics. Native to Africa, they are the third-largest antelope in the world.[3] The western or lowland bongo, T. e. eurycerus, faces an ongoing population decline, and the IUCN Antelope Specialist Group considers it to be Near Threatened on the conservation status scale.[2] The eastern or mountain bongo, T. e. isaaci, of Kenya, has a coat even more vibrant than that of T. e. eurycerus. The mountain bongo is only found in the wild in a few mountain regions of central Kenya. This bongo is classified by the IUCN Antelope Specialist Group as Critically Endangered, with fewer individuals in the wild than in captivity (where it breeds readily).[4] In 2000, the Association of Zoos and Aquariums in the USA (AZA) upgraded the bongo to a Species Survival Plan participant and in 2006 added the Bongo Restoration to Mount Kenya Project to its list of the Top Ten Wildlife Conservation Success Stories of the year. However, in 2013, it seems, these successes have been compromised by reports of possibly only 100 mountain bongos left in the wild due to logging and poaching.