Nest-building in primates Nest-building in primates Nest-building in primates refers to the behaviour of building nests by extant strepsirrhines (lemurs and lorisoids) and hominid apes (gorillas, chimpanzees, orangutans, and humans). Strepsirrhines build nests for both sleeping and also for raising families. Hominid apes build nests for sleeping at night, and in some species, for sleeping during the day. Nest-building by hominid apes is learned by infants watching the mother and others in the group, and is considered tool use rather than animal architecture. Old World monkeys and New World monkeys do not nest. It has been speculated that a major evolutionary advance in
Animal welfare in the United States on World Animal Protection's 2014 Animal Protection Index based on its policies towards animals. In regards to legislative attitudes towards animal welfare, a legislator's political party is the biggest influencer on how they will vote on a proposed animal welfare bill. Legislators representing the democratic party usually are the most in favor of bills that support legislation that improves animal welfare. While states have anti-cruelty statutes in addition to federal laws, many animal farming practices are exempt. This table shows which states have enacted bans on various industrial farming practices considered to be inhumane. According to the USDA, the total