Mud daubers are a type of wasp visually characterized by their dark metallic blue/black color and long thin waists. They get their name from their nests. They construct their nests out of mud, which they gather from soil or dirt and shape it into long, cylindrical structures found attached to walls. They are not aggressive, but are easily provoked if they believe their nest is at risk. 

Mud daubers are widespread amongst many habitats, like those in South Florida, and are mostly predators of spiders. Inside a mud dauber nest, it is common to see spiders they collected for their young to eat. Unlike many wasps, mud daubers are solitary creatures, preferring to keep to themselves. 

These pests can be prevented by removing their nesting sites, although that can be alarming for many homeowners. It’s always a good idea to contact a South Florida pest control professional for any needed assistance.