Insects make up most of the phylum Arthropoda , which is characterized by segmentation, hard exoskeleton, and jointed appendages.
Cockroaches have wings, and many of the larger species of roaches are capable of short flight.
Insecta Pterygota can also be subdivided into Exopterygota and Endopterygota. Exopterygota insects do not go through such a stage. Endopterygota insects include butterflies, moths, mosquitoes, flies, fleas, ants, bees, etc. Exopterygota insects include mayflies, dragonflies, locusts, katydids, and grasshoppers. Cockroaches fall into the Exopterygota group.