The Protoneuridae are small damselflies inhabiting streams in far south Texas. The male then clasps the female behind the head with claspers on the tip of his abdomen and mating pairs can be seen flying in tandem. The female then loops her abdomen forward and picks up the sperm from the male. Eggs are deposited in emergent plants or floating vegetation or directly into the water. The last immature stage crawls out of the water onto vegetation before the adult emerges.
Most species have one generation per year.
Aquatic immature stages are not strong swimmers. They occur on aquatic vegetation and on the bottom of streams and ponds. They feed on aquatic insects and other arthropods that are found in the water. Damselfly adults use their hind legs which are covered with hairs to capture prey as they fly. They hold the prey in their legs and devour it by chewing.