How do koalas stay in their tree while they sleep?

Koalas don't have a special adaptation for staying in trees while they sleep. They simply sleep very soundly and have strong claws that grip the bark of the tree.

Here's a breakdown:

* Sound Sleep: Koalas spend up to 22 hours a day sleeping. This deep sleep helps them conserve energy and stay safe while they're vulnerable.

* Strong Claws: Koalas have sharp, strong claws that help them cling to the branches. They have a special arrangement of claws that allows them to wrap around the tree trunk.

* Tree Selection: Koalas usually choose thick branches for sleeping. This provides a stable platform and helps them feel secure.

While they might move around in their sleep, it's very rare for a koala to fall from a tree because their grip is so strong.