David Attenborough's battle to save UK butterflies
19 July 2017 Last updated at 07:01 BST
Butterfly numbers have been falling in the UK for a number of years.
Now conservationist Sir David Attenborough has launched a big butterfly count to try to help them.
This will allow researchers to see how numbers are doing and what species have been found where!
Check out the video to find out more about the colourful insects and what you can do to help.