David Attenborough wants gardeners to change one habit to help animals.

David Attenborough made a TV show about the secret life in UK gardens.

He says gardens are special places with many different types of life.

Gardens help bees, wasps, and hedgehogs, and give birds a place to rest.

Attenborough shares tips to make gardens friendlier to wildlife.

One tip is to not mow the lawn so much.

Leaving the lawn a bit long helps animals.

When summer comes, people want to tidy up their gardens, but this might not be the best idea.

Letting the grass grow a bit helps insects and other animals.

Taller grass keeps water better and helps insects eat.

If you leave one area of lawn long, you will see a big difference soon.

A bird protection group agrees with Attenborough and says mowing less helps wildlife.

This helps grasses and flowers grow, making a safe place for small animals.

The group also says to avoid using strimmers and to wait until late summer to mow.