The mission to save the hazel dormouse
You might not have heard of a hazel dormouse and to be honest you probably won't have ever seen one either.
These tiny little mammals are nocturnal, which means they only come out at night.
This means they are rarely seen.
But conservationists say their numbers are dropping and now a team is trying to save the small creatures.
Check out the video to find out what is being done to help!