Hine' s emerald dragonflies are an endangered species that live in wetlands  The larvae of these dragonflies can survive only in the water, where they are subject to predation by several species including red devil crayfish
Surprisingly, the dragonfly populations are more likely to remain healthy in areas where red devil crayfish are present than in areas without red devil crayfish
Red devil crayfish dig chambers that remain filled with water even when the surrounding wetlands dry up.