Named Hydrophylita emporos—emporos is Latin for “passenger”—the female wasps were observed clinging to abdomens of damselflies, an aquatic insect related to a dragonfly. This acrobatic feat eventually pays off: When the damselfly starts laying its eggs on a submerged leaf, the wasp walks down the abdomen of the damselfly like it’s an exit ramp, enters the water, and then lays its own eggs in the damselflies’ eggs. –National Geographic

Pretty sneaky survival tactic.