In the common whitetail and blue dasher dragonflies (Plathemis lydia and Pachydiplax longipennis), males display the pruinescence on the back of the abdomen to other males as a territorial threat.
Male dragonflies from the common whitetail and blue dasher species (Plathemis lydia and Pachydiplax longipennis) display the pruinescent marking on their abdominal region as a signal to rival males to stay away from their territory.