Learn more on Mud daubers benefits, habits and removal strategies

Control Solutions Inc.

Mud daubers are large, easily recognizable wasps known for their intimidating appearance and unsightly nests. Despite their menacing look, these wasps generally are harmless to people and pets. Stinging is rare, only occurring when the insect is directly threatened, such as trying to swat it.

These wasps are considered beneficial insects, as they help control spider populations, including dangerous species like black widows (Latrodectus mactans). Their name comes from their unique nesting behavior: Mud daubers collect mud, sand, dirt or moist earth to build their nests. These nests can vary in shape, often appearing as long, tubular structures or more clumped together with individual cells.

Mud daubers typically attach their nests to the exteriors of buildings, such as under eaves, on decks or inside attics. They also may build under rocks or in garages or other sheltered areas. Once constructed, the nests are stocked with paralyzed spiders, which provide food for the wasp larvae.

Mud daubers can be in several genera, primarily in the order Sphecidae. They feature a distinctive, long, thin waist (the petiole) between the thorax and abdomen. Color varies, with some displaying an iridescent sheen. Unlike other social wasps, mud daubers are solitary creatures — each nest is tended by a single wasp.

If you’d like to remove a mud dauber nest, fear not! Because mud daubers do not defend their nest like their more aggressive cousins, use a soft putty knife to scrape it away gently, then apply a long-lasting repellent insecticide to the area.