The Cossidae constitute a large family mostly moths with xylophagous larvae (feed on wood). This family contains over 110 genera with about 700
known species, and many others that await description. The Cossidae are nightlife moths in the world, except in South-East Asia where the subfamily Ratardinae
is mainly active during the day. This family includes many species with large caterpillars and butterflies with a wingspan of 9-24 cm.
These moths are mostly gray, and some are long and narrow wings, that make them look like the Sphingidae.