The owlets belong to a very large family of moths with more than 25,000 known species. They are stoutly built. The front wings are often somber while the hind wings are sometimes very brightly colored. When resting, owlets fold their wings as a roof above their body or flatten them, overlapping one another. You see a silver-y in the picture above, named after the silvery-colored y-shaped marking on its wings. Silver-y moths are also active during the day. Owlet caterpillars are usually plump and have few hairs.