The first social interactions of a newborn primate are with mother. The mountain gorilla is very careful to support her young infant as it clings to her. All primates seek contact with mother as soon as they are born -- and most are able to cling on their own within a day or two of birth.
Contact with the mother is an important first social experience for humans, too.
Group of mountain gorillas in African forest.
Three male chimpanzees sit together. Photo taken in a zoo group.Scientific name: Pan troglodytes
Group of ring-tailed lemurs wrestling.Scientific name: Lemur cattalemurs -- LEE-mers
Two rhesus monkeys wrestle.The animal on top (with head upside down) shows the open mouth play face.Scientific name: Macaca mulattarhesus macaques - REE-sus ma-KACKS
A mother rhesus macaque at center with her offspring responds to threats from two other monkeys.
Closeup of face of a golden snub-nosed monkey.The flaps of skin at the corners of the mouth are a normal facial feature of adult males in this species.
Three chimpanzees in a zoo enclosure. The adult male on the left facing the camera is getting ready to run by the animals on the right.
Three ring-tailed lemurs from a captive group stand with tails in 'question mark' position. Animals are wearing identification collars.
A sifaka (related to the lemurs) rubs a scent-producing anal gland against the bark of a tree.Scientific name: Propithecus verreauxisifaka -- sih-FAHK-ah
Adult male chimpanzee stands bipedally and hoots.
An adult female stumptail macaque presents her genital area to an adult male. He will look, smell, touch and even taste her secretions to learn if she is ready to mate.Primates rely on many signals to determine the reproductive state of animals of the opposite sex.
Later in the same sequence, the female Japanese macaque looks over her shoulder at the male. This often occurs when the male ejaculates.
Three long-tailed macaques sit together. The adult female in the center grooms a juvenile on the right.Scientific name: Macaca fascicularis
A large group of long-tailed macaques, including some mothers holding infants on their bellies, sit together. An adult male in the top row is being groomed by two other animals.
A female rhesus macaque holding an infant stares off camera at an opponent.
Adult male silverback mountain gorilla stands bipedally while displaying in an African forest.Gorillas use a cupped hand position to make the sound associated with chest beating.
Members of two groups of African green monkeys threaten each other.Scientific name: Cercopithecus aethiops
Two large troops of rhesus monkeys threaten each other. Notice that several females carrying infants are in the front ranks.
Adult male lowland gorilla touches a young infant in a zoo enclosure.
Adult male saddleback tamarin carries a youngster on his back.Scientific name: Saguinus fuscicollis