Anatomical modifications for displaying bright coloration in megapodagrionid and chlorocyphid dragonflies (Zygoptera)

Males of some species of the Odonata families Megapodagrionidae and Chlorocyphidae flatten brightly colored abdominal segments which thus become more conspicuous from above, and the segments are structurally modified to allow this behavior. In the Chlorocyphidae, species with brightly colored abdomens have the ability to flatten them, and species with extensively colored wings tend to have broader wings than those in which the wings are uncolored.