Microlepidoptera are a big group of small moths. To some extent, it’s a grouping that’s determined by the size of the moth; there are some families that include both macro and micro species, and the families of the micros tend to be more primitive than those of the macros. The group is very diverse and includes a bunch of day-flying species, and the biographies of many have not been written. Remember—of the 18,000 or so species of Lepidopterans in North America, more than 11,000 are moths. Here are three (and a half) of them.