 our own line, dirtdoctor.com, so you understand which ones are the ones to be careful about. Mud daubers are the safest to be around. The Texas yellow jackets are the most dangerous. They control caterpillars, is what they do. They'll eat the caterpillars, and they'll take, they'll eat them, the adults will eat them, or they'll take them back to their nest and feed them to their young.