Mud Dauber Wasps

Mud Dauber Identification and Removal in Southeastern Wisconsin

Are Mud Daubers Aggressive?

Mud daubers, found throughout Southeastern Wisconsin, are solitary wasps and are rarely aggressive toward humans. Unlike yellow jackets or paper wasps that defend a colony, a mud dauber builds a nest for itself and its offspring. They generally will not sting unless you directly handle them or threaten their nest.

What Do Mud Daubers Look Like?

These wasps are easy to identify by their long, thread-like waist that connects the thorax and abdomen. In Wisconsin, you will typically see the Black and Yellow Mud Dauber or the Metallic Blue Mud Dauber. They are slender and appear much longer than standard bees or wasps.

Identifying a Mud Dauber Nest

If you see tubes of dried mud on your brick, siding or eaves, you likely have mud daubers. They collect wet soil to construct organ-pipe style nests in sheltered areas. You will often find these nests in:

• Garage corners
• Under roof eaves
• Attic spaces
• Sheds and barns

Do Mud Daubers Sting?

Yes, mud daubers can sting, and their venom is painful. However, they are not prone to stinging. Most stings occur when a homeowner accidentally grabs one or presses against one while working outdoors. Because they are solitary, you do not need to worry about a swarm attacking you.

Mud Daubers vs. "Mud Bees"

Many Wisconsin residents refer to these insects as "mud bees" because of their nests. True bees usually nest in wax combs or wood tunnels, while mud daubers are the only large wasps in our region that construct homes entirely out of mud.

When Should You Remove a Mud Dauber Nest?

While they are beneficial for controlling spider populations, their nests can be an eyesore and messy. If a nest is located near a high-traffic doorway or inside a garage where you work frequently, professional removal is the best option to avoid accidental contact.