A female koala feeds her joey for 6-7 months, but not exclusively on mothers' milk.
Koala joeys do drink mother's milk during their first 6-7 months of life. However, after 30 weeks, the mother also produces a substance called pap. This substance is actually a specialised form of the mother's droppings which, having passed through her digestive system, give the joey the enzymes it needs to be able to start digesting the tough gum leaves, making an easier transition for the baby koala to start eating eucalyptus leaves.
Up to 18 months
1 year
At no time is a baby koala (joey) in its mother's stomach. If the question refers to the gestation period of a koala, the answer is 34 to 36 days. If the question refers to how long the joey stays in its mother's pouch, the answer is for around six to seven months, where they feed on milk and develop fully.
For at least one year
Up to 18 months
A koala joey stays with its mother for about a year, but is fed by her for only the first seven months or so.
A female koala looks after its young for about a year. The koala baby, called a joey, feeds only on mothers' milk for 6-7 months, and it remains in the mother's pouch during this time. At about 6-7 months the joey begins to feed on "pap", which is actually a special form of the mother's droppings through which she can pass onto her joey the micro organisms which allow for digestion of eucalyptus leaves. The koala has a backward-opening pouch so that the joey can stick its head out and feed on this pap which comes from the mother's own digestive system. When the joey grows too large to fit in its mother's pouch, it still feeds a bit on mother's milk, lying on her stomach to feed, and spending the rest of its time firmly attached to her back. It only leaves "home" when the next breeding season starts. As koalas breed once a year, the young joey basically stays with its mother for about a year.
1 year
How long baby koala bears stay with their parents can vary depending on how often the mother reproduces. On average, the koala bear stays in its mother's pouch for five to seven months.
At birth, a koala joeyresembles a kidney bean. Less than 2cm long, it is pinl, hairless and blind, and without the prominent ears it has as an adult. Its grey oval nose is discernible.Most of a joey's (baby koala's) development takes place in the mother's pouch. As it grows, it begins to actually look like a koala. By the time the young koala is old enough to crawl out of its mother's pouch, it is a miniature replica of its parents.
Till the age of about 3 to 4 and a half years old.
As with human motherhood, suckling babies can vary in length of time and development.