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 and rights in the Netherlands is unclear what the implications of this declaration are in practice. As a member of the European Union (EU), beginning in the 1990s Netherlands began to implement EU regulations on animal welfare, including a 1997 measure forbidding pen confinement of veal calves greater than 8 weeks old, a 1998 directive on the five freedoms for farmed animals, and bans on testing cosmetics on animals, barren battery cages, and gestation crates. The Animals Act 2011 prohibits causing an animal pain or injury or damaging its health and welfare without reasonable purpose or in excess of what is reasonable for such purpose.