Mud dauber

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(Redirected from Dobbers)

Sceliphron caementarium MHNT Profil
Organ Pipe Wasp nest
Mud Nest of Mud dauber

Mud dauber (or mud wasp) is a common name given to a variety of wasps from different families, including the Sphecidae and Crabronidae, that build their nests from mud. Mud daubers are solitary wasps, meaning they live and work alone, which distinguishes them from social wasps such as yellowjackets, hornets, and paper wasps. These insects are found in various parts of the world and are known for their distinctive mud nests, which they attach to sheltered places like the eaves of houses, sheds, or even inside garages.

Characteristics[edit | edit source]

Mud daubers are slender, long wasps, typically black or metallic blue in color, and can be identified by their thread-waisted body, meaning there is a noticeable constriction between the thorax and abdomen. They range in size from about ½ to 1 inch (1.27 to 2.54 cm) in length. Unlike their more aggressive relatives, mud daubers are not typically aggressive and rarely sting humans unless directly handled or threatened.

Life Cycle[edit | edit source]

The life cycle of a mud dauber includes four stages: egg, larva, pupa, and adult. The female mud dauber constructs a mud nest and lays her eggs in individual chambers within the nest. She then hunts for spiders, which she paralyzes with her sting and places in the chambers as food for the developing larvae. Once the egg hatches, the larva feeds on the spiders left by the mother, eventually pupating and emerging as an adult wasp. This cycle can vary in length depending on environmental conditions but generally completes within a few weeks to months.

Nesting Habits[edit | edit source]

Mud daubers are known for their unique nests, which are made from mud collected by the females. These nests can vary in shape and size but are often cylindrical or tube-like and may be constructed in clusters. The choice of nesting site is critical for the protection of the offspring, with mud daubers preferring sheltered locations that are safe from predators and the elements. Once a nest is completed and stocked with food, it is sealed off, and the female moves on to create more nests.

Diet[edit | edit source]

The primary diet of mud dauber larvae is spiders, which are provided by the female wasp. Adult mud daubers, however, feed on nectar and water, making them occasional pollinators. The hunting of spiders for their larvae makes mud daubers beneficial in controlling spider populations around homes and gardens.

Control and Removal[edit | edit source]

Although mud daubers are generally harmless and beneficial, their nests can be considered a nuisance, especially when built in or around human dwellings. If removal is necessary, it is best done in the late evening or early morning when the wasps are less active. Protective clothing should be worn as a precaution. The nests can be scraped off surfaces and destroyed. Preventive measures include sealing entry points to buildings and reducing the availability of mud for nest building.

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Contributors: Prab R. Tumpati, MD