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 on research animal welfare. Researchers are required to reduce and refine scientific research on animals and prohibited from using animals where expert opinion shows that the objective can be achieved by non-animal research. Testing cosmetics on animals is prohibited as per EU animal welfare rules, as is the use of great apes in experiments In 2014, the Netherlands received a B out of possible grades A,B,C,D,E,F,G on World Animal Protection's Animal Protection Index. Statistics on the number of animals raised and/or killed for food each year in the Netherlands include: In 2006, an estimated 4% of Dutch identified as vegetarian.