Blue mud dauber
The blue mud dauber is a metallic blue species of mud dauber wasp first described by Henri Louis Frédéric de Saussure in 1867. It is the primary predator of black widow spiders. Females build their own nests, but occasionally refurbish nests abandoned by other mud dauber wasps, particularly Sceliphron. It is not normally aggressive. It is similar in shape and colour to the steel-blue cricket hunter. Like other types of wasps, males do not have an ovipositor, and therefore cannot sting.
