Cattle are large quadrupedal ungulate mammals with cloven hooves. It is an odd-toed ungulate mammal belonging to the taxonomic family Equidae. However other herbivores, specifically ungulate species, tend to fetch exponentially higher sums than carnivores. The bongo ("Tragelaphus eurycerus") is a herbivorous, mostly nocturnal forest ungulate. There are 33 species and ten subspecies of non-cetacean even-toed ungulate assessed as endangered. Elk Island National Park has a prominent history in large ungulate conservation. The Valparai range is habitat to the Nilgiri tahr, an endemic wild ungulate. Of wild species of ungulate, deer are the preferred prey family. In Hunchun National Nature Reserve, poaching of ungulate species impedes recovery of the tiger population. The Valparai range is also habitat to the Nilgiri tahr, an endemic wild ungulate. Eurohippus is an extinct genus of equid ungulate. Tiger attacks on bears tend to occur when ungulate populations decrease. FIV displays a similar structure to the primate and ungulate lentiviruses. The only native even-toed ungulate is the white-tailed deer. This is a list of even-toed ungulate species by estimated global population.