The incredibly thin 'waist' on this wasp led to its name. It is an ambush attacker, immobilizing insect prey with a swift sting. Its powerful jaws them aid in dragging the victim back to its underground lair. A relative of Mud Daubers, the Thread-Waisted Wasp builds a burrow in loose dirt. Inside, tunnels or cells are excavated and the paralyzed prey is stored in one for later consumption by its larvae. One egg is laid on a paralyzed food source and when the egg hatches, the parasitic wasp larvae will begin consuming the paralyzed victim until it matures and flies away from the nest.
Adults drink flower nectar and feed on small insects they catch in the open. Since many plant-consuming caterpillars are taken as larvae food, this insect could be considered beneficial to gardeners and farmers. They are not known to be aggressive toward humans, though stepping on or mishandling them may result in a defensive sting.
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