"As they are solitary animals, it takes an expert eye to know how to successfully introduce a male and female together for breeding. There is a lot of dedication and skill involved in caring for koalas, and it is a significant achievement for everybody involved."

Koalas have a gestation period of 30-35 days and keepers believe that the joey was born in mid-May. As koala joeys are born very underdeveloped - blind, about the size of a jelly bean and with no ears or fur - they remain in their mother's pouch for around six months.

During its time in the pouch, the joey will suckle on milk and a substance called "pap", which is a special type of dropping produced by the mother, which contains micro-organisms which are vital for digesting eucalyptus leaves later in life. 

According to keepers, Alinga is very relaxed and has recently started allowing them to feel the pouch. The joey currently weighs around 100-150 grams and is expected to poke its head out of the pouch in mid-October.

Following this, it should start to climb onto Alinga's stomach in mid-November, by which time it will weigh 400 grams. 

Around December the joey will then move onto Alinga's back and zoo keepers will weigh, sex and name it. It will remain on its mother's back until it is about 12 months old. 

Once it reaches sexual maturity, the joey will join the European breeding programme, of which Edinburgh Zoo has been a part for eight years.

Koala populations are in decline throughout the eastern coast of Australia due a loss of habitat. It is therefore highly important that successful breeding programmes are established outside of Australia.

The success of keepers at Edinburgh Zoo is a significant achievement and will help to establish Britain's role within the koala breeding programme.