We have been given lots of small stickers with a code on them, that we have to stick onto the wing of a monarch butterfly. We then put the details from the sticker into a database and if someone else finds it and sees the sticker and adds in the details, we can see how far it has flown.
You have to be really careful when you stick the sticker on the wing so you don't damage the butterfly.
If you want to have a look check out this link!!
