Lowland Bongo (Tragelaphus eurycerus eurycerus) Also known as the Western Bongo, the bongo is one of the largest African forest antelope species at 10ft long and 4ft high. Bongos can be found in dense tropical jungles in many African countries. they are mostly nocturnal but can be found during the day as-well. their diet mostly consists of leaves and shrubs, and are known to visit natural salt licks to fulfill their sodium needs.