This weekend Londoners are being called to do their bit to help protect our city's wildlife.
The RSPB is asking everyone to take time to do an animal audit of any creature you spot in your garden.
Birds, hedgehogs or even badgers - it all provides vital information to protect London's ecosystem.
They've even developed an app to make it easier. Find out how to take part here.
Here are some of the birds and animals you can look out for.