Vespula pensylvanica, the western yellowjacket (western yellow jacket), is a Nearctic species of wasp in the genus Vespula. It is native to regions of North America, largely in areas with northern temperate climates. Its reproductive behavior is constrained by cold weather, which successfully reduces the number of western yellowjackets in cold months. However, in the absence of cold weather, this wasp's population can explode. The western yellowjacket has become particularly invasive in the Hawaiian Islands, resulting in their label as a major pest.
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Is it venomous or poisonous?
Considered venomous. Public sources list it as such; we have not verified this individually. The note covers its whole family. Wasps and hornets; stings Never eat, touch or handle a wild plant, mushroom or animal on the strength of an identification; ask someone qualified.
Easily confused with
- Vespula germanica — considered venomous
- Vespula atropilosa — considered venomous
- Vespula flavopilosa — considered venomous
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Hymenoptera
- Family
- Vespidae
- Genus
- Vespula
- Species
- Vespula pensylvanica
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