North Sulawesi babirusa Angeles Zoo, South Lakes Safari Zoo, Marwell Wildlife, Audubon Zoo and Chester Zoo. In 2006, a male North Sulawesi Babirusa and a female domestic pig were accidentally allowed to interbreed in the Copenhagen Zoo. The offspring were 5 hybrid piglets with teeth most resembling the North Sulawesi Babirusa, while their colour was highly variable. North Sulawesi babirusa The North Sulawesi babirusa, "Babyrousa celebensis", is a pig-like animal native to Sulawesi and some nearby islands (Lembeh, Buton and Muna) in Indonesia. It has two pairs of large tusks composed of enlarged canine teeth. The upper canines penetrate the top of the
Wild animal suffering nature would be either unethical, unfeasible, or both. In his autobiography, Charles Darwin acknowledged that the existence of extensive suffering in nature was fully compatible with the workings of natural selection, yet maintained that pleasure was the main driver of fitness-increasing behavior in organisms. Evolutionary biologist Richard Dawkins challenged Darwin's claim in his book "River Out of Eden", wherein he argued that wild animal suffering must be extensive due to the interplay of the following evolutionary mechanisms: From this, Dawkins concludes that the natural world must necessarily contain enormous amounts of animal suffering as an inevitable consequence of Darwinian evolution.