Babirusa actually pierce the flesh in the snout. All species of babirusa are listed as threatened by the International Union for Conservation of Nature (IUCN), shown on their Red List since at least 2010 and current in 2017. The genus is monotypic within the subfamily Babyrousinae, or alternatively considered to form a tribe, Babyrousini, of the subfamily Suinae. To date, only one fossil skull has been found to suggest a larger ancestor. All members of the genus were considered part of a single species until recently, the babirusa or pig-deer, "B. babyrussa", but following the split into several species, this scientific
The Call of the Wild on trust and love. Writing in the "Introduction" to the Modern Library edition of "The Call of the Wild", E. L. Doctorow says the theme is based on Darwin's concept of survival of the fittest. London places Buck in conflict with humans, in conflict with the other dogs, and in conflict with his environment—all of which he must challenge, survive, and conquer. Buck, a domesticated dog, must call on his atavistic hereditary traits to survive; he must learn to be wild to become wild, according to Tina Gianquitto. He learns that in a world where the "club and the fang"