Have you ever watched a butterfly land on something and slowly open and close its wings over and over kinda like it's waving?
That's the female butterfly. She does this to signal to a male butterfly that she'd like for him to come over and get a little lovin'.
Scientists have experimented with this. What they have done is, they have taken a large cardboard cut-out of a butterfly, put that beside a real-life "waving" butterfly and watched what the male does. The male will always go to the cardboard butterfly.
That is really sad.
Thanks for sharing it, though.