The RSPB is encouraging people to camp in their back gardens this week to find out which creatures they share their homes with.
It's part of the Big Wild Sleepout which raises money for the country's wildlife.
If you don't have a garden, RSPB Centres across the South are holding local events.
At RSPB Farnham Heath in Surrey, campers can pitch their tents in a wooded area and take part in after dark activities.
People heading to RSPB Pulborough Brooks in West Sussex can set up camp in the wildflower meadow and get to meet glowworms and bats when the sun goes down.
All money raised will go to help give nature a home.