Fauna
Insect

Four-toothed Mason Wasp

Monobia quadridens

Also known as Four-Toothed Potter Wasp

Four-toothed mason wasps are striking solitary insects easily identified by their solid black body marked by a single bold white-to-cream band across the abdomen. Females hunt leaf-rolling caterpillars, paralyzing them with a precise sting before caching them inside hollow plant stems, wooden crevices, or abandoned carpenter bee galleries as food for their larvae. Despite possessing a potent defensive sting, these calm wasps are non-aggressive toward humans and serve as helpful natural garden pest controls.

SolitaryPredatoryPollinator
Four-toothed Mason Wasp reference1 / 7
(c) Lexi Destria, some rights reserved (CC BY) · cc-by
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Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Key facts
Diet & preyCaterpillars, Nectar, Pollen
Predators
  • Birds
  • Spiders
  • Parasitic wasps
ThreatsBroad-spectrum pesticide use and habitat destruction
HabitatsWoodlands, meadows, gardens, and forest edges
Life span1–2 months as adults; up to 1 year overall
Classification
  1. OrderHymenoptera
  2. FamilyEumenidae
  3. GenusMonobia
  4. SpeciesMonobia quadridens
Range & activity
Range data is not available yet.
Safe observation
Interaction riskVery high
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is very high
Females can deliver a painful sting if squeezed or cornered; observe quietly from a safe distance.
Why it is dangerous
Injects venom through a sting that causes localized pain and swelling, posing severe risk to allergic individuals.
How to recognize a risky encounter
Recognizable by a stout black body, dark smoky wings, and a single wide white band across the abdomen.
What to do
Never handle adults or block active nest cavities; observe from a respectful distance.
Responsible observation
  • Observing Nests: Watch females carrying paralyzed caterpillars into hollow stems during summer.
  • Garden Habitat: Planting native flowering perennials provides essential nectar for adult wasps.
  • Safe Distance: Maintain a comfortable distance of a few feet to avoid disturbing nesting females.
Related species
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