Biology and Habits

Mud daubers are solitary wasps and do not live in colonies, however occasionally groups of wasps may build their nests in close proximity. Nests are composed of several tubes of mud, provisioned with several paralyzed spiders and an egg. Larvae develop inside of the nest and overwinter before pupating and emerging as adults in the spring. Mud daubers prefer to build their nests in sheltered locations including in sheds and garages, under eaves and gutters, attics, or in porches. 

Control

Mud daubers are not aggressive and do not normally require control. They are beneficial and help control spider populations. However, occasionally large groups may build mud nests in close proximity to humans and animals. Treat the wasps with an appropriately labeled aerosol or liquid pesticide and scrape off the mud nest if desired. If holes are present in the mud tubes, the nest is most likely inactive and can be safely removed without treatment.