Polyphemus Moth

Image: Mike Habeck

The Polyphemus Moth is one of the largest moths in North America, with a wingspan up to six inches. The large green caterpillars can be found feeding on a variety of tree species during the summer. Northern populations have one generation per year, while those to the south may have two generations per year. The adults do not feed. They are often attracted to lights at night. Polyphemus Moths and moths like them are also known as Giant Silkworm Moths, so called because of their size and the silken cocoons in which they pupate.