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
World Animal Day World Animal Day World Animal Day is an international day of action for animal rights and welfare celebrated annually on October 4, the feast day of Francis of Assisi, the patron saint of animals. The mission of World Animal Day, is "To raise the status of animals in order to improve welfare standards around the globe. Building the celebration of World Animal Day unites the animal welfare movement, mobilising it into a global force to make the world a better place for all animals. It's celebrated in different ways in every country, irrespective of nationality, religion, faith or political ideology.