I'm not sue just which "brand" these usually are, Mary Ann ! But I do remember the "invasion" of '06 ( I think it was '06, anyway

), as we spent a lot of time at a local campground that summer, and the place was crawling with them....several Universities had "study groups" of students there, collecting, studying, photographing, etc. It was kinda' neat to see, and to watch the rascals dig themselves out of the ground, and crawl up the tree trunks !