These little buggers (no pun intended) are why they can’t build anything behind my old house. It’s just a barren hillside that flowers in the spring and is a fire hazard the rest of the year. Most of these butterflies are not blue at all. They look white, and I’m pretty sure I’ve killed a dozen of them in my 20+ years living in that house thinking they were moths. You can read more about them here and see the whole gallery of extinct animals back from the dead here.