Mud daubers are solitary wasps known for their distinctive nests made from mud, which they construct in sheltered locations such as under eaves, bridges, or rock crevices. They are generally non-aggressive and rarely sting unless handled or threatened. Mud daubers prey on spiders, which they paralyze and carry back to their nests to provide food for their larvae. Despite their beneficial role in controlling spider populations, mud dauber nests can be unsightly and may require removal if located in undesirable areas.