Mud-nests
Guides
Ageniellini
Mud-nesting Spider Wasps
Ageniellini is a cosmopolitan tribe of spider wasps (subfamily Pepsinae) comprising 17 genera. Members are commonly known as mud-nesting spider wasps due to their frequent construction of thimble-shaped mud nests, often communally. The tribe exhibits exceptional behavioral diversity, with three distinct nesting strategies: mud nest construction, dry soil excavation, and kleptoparasitic nest usurpation. These strategies have evolved independently multiple times from nest-constructing ancestors. Like all Pompilidae, females provision nests with paralyzed spiders as larval food, with most Ageniellini species characteristically removing spider legs before transport.
Delta
potter wasps
Delta is a genus of Old World potter wasps in the family Vespidae, subfamily Eumeninae. The genus was established by Henri Louis Frédéric de Saussure in 1855. Species are predominantly distributed through tropical Africa and Asia, with some representation in the Palearctic region. A few species have been introduced to the Nearctic and Neotropical regions. Delta wasps construct characteristic pot-shaped mud nests and provision them with paralyzed caterpillars for their developing larvae.
Eumenes
potter wasps
Eumenes is the type genus of the subfamily Eumeninae, commonly known as potter wasps. This large and widespread genus contains over 100 taxa (species and subspecies), predominantly distributed in temperate regions of the Northern Hemisphere. Females construct distinctive free-form mud nests—urn-shaped cells about the size of a marble, often with fluted necks—each housing a single offspring provisioned with paralyzed caterpillars. The genus is characterized by black or brown coloration with striking contrasting patterns of yellow, white, orange, or red.
Odynerus
potter wasps, mason wasps
Odynerus is a primarily Holarctic genus of potter wasps in the subfamily Eumeninae. The genus has been widely used as a root for constructing names of other potter wasp genera with non-petiolated metasoma, including Euodynerus, Acarodynerus, Stenodynerus, Parodontodynerus, and Incodynerus. Species within this genus are solitary wasps that construct nests using mud or soil, often with distinctive turrets or chimneys. The genus contains hundreds of species, with Odynerus spinipes being particularly notable for exhibiting exceptional intrasexual cuticular hydrocarbon dimorphism in females.
Pachodynerus
potter wasps
Pachodynerus is a genus of approximately 50 species of solitary potter wasps in the subfamily Eumeninae. The genus exhibits highest diversity in central South America, with species distributed across the Neotropical and Nearctic regions. These wasps are cavity-nesters that construct mud cells in pre-existing holes, including abandoned insect burrows, plant stems, and human-made structures. Several species have been introduced beyond their native ranges, including P. nasidens which has established populations on oceanic islands and caused aviation safety incidents in Australia by nesting in aircraft pitot probes.
Potter and Mason Wasps
Potter Wasps, Mason Wasps
Eumeninae is a cosmopolitan subfamily of solitary wasps within Vespidae, commonly known as potter and mason wasps. The group includes approximately 3,579 described species worldwide, making it the most diverse group within Vespidae. Adults are primarily nectar-feeders, while larvae are predatory, developing on paralyzed caterpillars or beetle larvae provided by females. Nesting strategies are diverse: many species use pre-existing cavities in hollow stems, wood, or abandoned insect burrows, while others construct free-form mud nests or excavate burrows in soil. Females typically lay a single egg suspended by a silken thread before provisioning cells with prey, a distinctive trait among solitary wasps.
Vespidae
Hornets, Paper Wasps, Potter Wasps, Yellowjackets, Mason Wasps
A large, cosmopolitan family of wasps encompassing nearly 5,000 described species. Vespidae includes nearly all known eusocial wasps—such as hornets, yellowjackets, and paper wasps—as well as numerous solitary species including potter and mason wasps. The family exhibits remarkable diversity in nesting behavior, from paper nests constructed from chewed plant fibers to mud nests and soil burrows. Social colonies typically contain a reproductive queen and sterile or subfertile female workers, with temperate species producing new queens and males annually before colony collapse in winter.