Wasp with caterpillar victim

Remember my mud-nesting wasp with the mutilated wolf spider? Well, now meet a thread-waisted wasp (family Sphecidae, perhaps genus Ammophila) dragging a paralyzed caterpillar across sedum. Most of these parasitic wasps sting and paralyze their victims, then drag them to their burrows or nests. There they'll lay their egg(s) on the victim so the larvae have fresh food to eat when they hatch. Thank you, Linda Chang, for sharing your observation and photos with me!