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
The Animal World (film) The Animal World (film) The Animal World is a 1956 documentary film that was produced, written and directed by Irwin Allen. The film includes live-action footage of animals throughout the world, along with a ten-minute stop motion animated sequence about dinosaurs. Irwin's intention was to show the progression of life over time, although he noted, "We don't use the word 'evolution.' We hope to walk a very thin line. On one hand we want the scientists to say this film is right and accurate, and yet we don't want to have the church picketing the film." The special effects in