The foraging behavior of Delta esuriens is observed on a female wasp. To paralyze the prey, a total of two stings in its abdomen segments are used by D. esuriens. The first sting aims at the sixth segment and the second at the seventh segment. The total time of catching the prey is about four minutes. A green worm, one of mainly insect pests on sesban, is one of the preferred prey of D. esuriens.