Underwings are a group of moths that fall under another group of moths—you go look it up if you need that level of detail. We don’t! We just know that these moths, for all the world a gray splotch blending into bark, sometimes flash those lower wings at us when we run upon them. It scares the beegeebees out of us squirrels, and we’ve seen many a bird take off. No one likes surprises in their food, making Underwings very well protected.