Kay eye ess ess eye en geee. No not really. Hiding from predators for the night. Tomorrow morning they will continue devouring my tree.
No, we do not kill anything unless they are definitely invasive, which these guys aren’t. They are only a problem if you happen to sit on one, (and you happen to be naked, I suppose) generally they are not a nuisance at all. They stay in their tree, dispersing to eat during the day, and getting back together in clumps like this at night.