![]() Infant gorillas are weaned at 2.5 to 3 years of age. ![]() Infant gorillas normally stay with their mother for 3 to 4 years and mature at around 11 to 12 years old. The baby gorilla can crawl at around 9 weeks old and can walk at about 35 weeks old. Gorilla infants are breast feed for about 12 months. Baby gorillas are carried around by their mothers and begin to walk after 30 – 40 weeks. A baby gorilla is born weighing 1.8 – 2 kilograms (4 – 4.4 pounds) after a gestation period of 251 – 295 days. Fights for access to female gorillas among dominant silverbacks and lone males are intense and may result in death.Īdult female gorillas give birth to one baby about every 4 years although a surviving infant is produced only every 6 to 8 years due to high infant mortality in the first 3 years of life. Once a male gorilla has established a group, he will most likely stay with that group for life unless he is ousted by another male gorilla. About half of all male gorillas leave their natal group at puberty and travel alone or with other subordinate male gorillas until they establish their own group. Male Eastern Lowland Gorillas mature later than female Eastern Lowland Gorillas and do not breed until 15 to 20 years of age. ![]() ![]() mother/daughter, sisters) will groom one another. The bonds between these unrelated adult female gorillas are loose and only related female gorillas (e.g. Female Eastern Lowland Gorillas leave their birth groups to join other groups or single male gorillas when they reach sexual maturity at around 7 or 8 years of age. ![]()
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