Buru babirusa teeth are strong enough to crack any kind of nuts. Babirusas lack the rostral bone in their nose, which is a tool used by other wild pigs for digging. Therefore, they prefer feeding on roots in soft muddy or sandy soils. Cannibalism was reported among babirusas, feeding on the young of their own species or other mammals. North Sulawesi babirusas form groups with up to a dozen of individuals, especially when raising their young. Older males might live individually. The north Sulawesi babirusa reach sexual maturity when they are 5–10 months old. Their estrous cycle is 28–42 days, and the
Wild water buffalo International Commission on Zoological Nomenclature placed "Bubalus arnee" on the "Official List of Specific Names in Zoology", recognizing the validity of this name for a wild species. Most authors have adopted the binomen "Bubalus arnee" for the wild water buffalo as valid for the taxon. Only a few DNA sequences are available from wild water buffalo populations. Wild populations are considered to be the progenitor of modern domesticated water buffalo, but the genetic variation within "B. arnee" is unclear, and also how they are related to the domesticated river and swamp forms. Wild water buffalo The wild water buffalo ("Bubalus