I recently found and killed a yellow-and-black mud dauber wasp that was very docile because I didn't realize mud daubers are non-aggressive. When left alone, these wasps only use their stingers to ...

Of the over 4,000 known species of wasps in California, two are known as mud daubers: Sceliphron caementarium (black and yellow mud dauber) and Chalybion californicum (blue mud dauber). Mud daubers ...