Babirusa lowland areas near coasts in the past. They are also active during the daytime. Like all pig species, babirusa have an omnivorous diet with an intestinal tract similar to that of the domestic pig. The stomach diverticulum of a babirusa is enlarged which may indicate that it is a ruminant but evidence shows otherwise. Because it does not have a rostral bone in the nose, a babirusa does not dig with its snout like other pigs do except in mud and swampy grounds. The diet of the babirusa includes leaves, roots, fruits and animal material. Apparently, the strong jaws of
Wild horse cranial and metacarpal differences, indicates the presence of only two subspecies in postglacial times, the tarpan and Przewalski's horse. At present, the domesticated and wild horses are considered a single species, with the valid scientific name for the horse species being "Equus ferus." The wild tarpan subspecies is "E. f. ferus", Przewalski's horse is "E. f. przewalskii", and the domesticated horse is "E. f. caballus". The rules for the scientific naming of animal species are determined in the International Code of Zoological Nomenclature, which stipulates that the oldest available valid scientific name is used to name the species. Previously, when