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
The Call of the Wild American literature scholar Donald Pizer, is that it is a combination of allegory, parable, and fable. The story incorporates elements of age-old animal fables, such as "Aesop's Fables," in which animals speak truth, and traditional beast fables, in which the beast "substitutes wit for insight". London was influenced by Rudyard Kipling's "The Jungle Book", written a few years earlier, with its combination of parable and animal fable, and by other animal stories popular in the early 20th century. In "The Call of the Wild", London intensifies and adds layers of meaning that are lacking in these stories. As a writer