This is a Skipper. While some sources lump them in with butterflies, more and more evidence is piling up to justify calling them a separate group. Skippers are already classified in their own family, Hesperiidae, and many of their characteristics do not fit in with the classic butterfly/moth descriptions. They tend to be small and fast, with wings that are small for their body size. Their antennae are slightly hooked, like a crochet hook. They are usually drab colors, and are easy to miss, but they are actually quite common.