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This is John Bachelor. Tonight a conversation with Daniel Claude, the

biologist from Adelaide Hills, Australia, South Australia. Her new book is

Koala, a natural history and an uncertain future. The Koalas are

marsupials, two-thirds of the mammals in Australia are marsupials, an

alternative form of birthing and care for the young. Daniel in response to

my question about how it's done gives us the life cycle of a newborn

Koala called a Joey and its relationship with mom, with the mother.

Koalas are wonderful creatures, make strange sounds, live in eucalyptus

trees in Australia, all across Australia. And because of the wildfires and because

of habitat destruction, the Koalas are constantly shifting around and hanging

on, but they've been with Australia for at least 24 million, perhaps 36

million. So, I'm counting on the Koala to be there for another 24 or 36. Here's

Danielle on the care of a Joey. So, the mother, the Joey stays in the patch

for about five months after it's in the patch. So, it's not seen at all. So, the

baby first emerges, it pops its head out at about five months. And from there it

will start to slowly come out more frequently and climb out of the patch. But

it still stays, it's still drinking milk and reliant on the mother. And then it

starts to, it becomes, it's winged off the milk and starts to eat gum leaves. But

...