Yellowjacket

Yellowjacket facts at a glance

How big is a yellowjacket?

An adult yellowjacket measures 1 cm long — about 1% of the height of an average adult person (1.73 m) — and weighs around 0 g, a small fraction of an average adult’s body weight (70 kg).

What is a group of yellowjackets called?

Explore more animal collective nouns and baby animal names .

A society in a paper nest

Yellowjackets are social wasps that build nests from chewed wood pulp, creating papery combs often hidden underground, in wall cavities, or in bushes. A single queen starts the nest each spring, and the colony can grow to thousands of workers by late summer before dying off in autumn.

Sting and defense

Unlike a honey bee, a yellowjacket has a smooth stinger and can sting many times. They are highly defensive of their nest and will swarm to attack a perceived threat. Their stings are painful and, for people allergic to insect venom, can be dangerous.

Helpful, then a nuisance

For much of the year yellowjackets are valuable predators, hunting caterpillars, flies, and other pest insects to feed their larvae. In late summer, with fewer larvae to feed, adults switch to seeking sugars and protein, which is when they crowd around picnics, drinks, and trash.

Telling them apart

Yellowjackets are often mistaken for bees, but they are slimmer, nearly hairless, and more sharply marked in bright yellow and black. Bees are fuzzier and gather pollen, while yellowjackets are sleek hunters and scavengers.

Did you know? Yellowjacket facts

• A yellowjacket is a black-and-yellow social wasp that lives in large paper nests ruled by a queen.
• Yellowjackets are slim, shiny wasps that can sting repeatedly and scavenge meat and sugar, while bees are fuzzy, gather pollen, and usually sting only once.
• Yes. A yellowjacket has a smooth stinger, so unlike a honey bee it can sting repeatedly and will do so to defend its nest.
• By late summer the colony has few larvae left to feed, so adult yellowjackets seek out sugars and protein and crowd around food, drinks, and trash.
• Yes. For most of the year yellowjackets hunt caterpillars, flies, and other pest insects, making them helpful natural pest controllers.
• Conservation: Least Concern (IUCN).

Diet & feeding

Yellowjacket feeds primarily as a omnivore (insects, nectar, human food). Yellowjackets are social wasps that build nests from chewed wood pulp, creating papery combs often hidden underground, in wall cavities, or in bushes. A single queen starts the nest each spring, and the colony can grow to thousands of workers by

Adaptations

• Yellowjackets are social wasps that build nests from chewed wood pulp, creating papery combs often hidden underground, in wall cavities, or in bushes. A single queen starts the nest each spring, and the colony can grow to thousands of workers by late summer before dying off in autumn.
• Unlike a honey bee, a yellowjacket has a smooth stinger and can sting many times. They are highly defensive of their nest and will swarm to attack a perceived threat. Their stings are painful and, for people allergic to insect venom, can be dangerous.

Behaviour & ecology

• Yellowjackets are social wasps that build nests from chewed wood pulp, creating papery combs often hidden underground, in wall cavities, or in bushes. A single queen starts the nest each spring, and the colony can grow to thousands of workers by late summer before dying off in autumn.
• Unlike a honey bee, a yellowjacket has a smooth stinger and can sting many times. They are highly defensive of their nest and will swarm to attack a perceived threat. Their stings are painful and, for people allergic to insect venom, can be dangerous.
• For much of the year yellowjackets are valuable predators, hunting caterpillars, flies, and other pest insects to feed their larvae. In late summer, with fewer larvae to feed, adults switch to seeking sugars and protein, which is when they crowd around picnics, drinks, and trash.

Communication

• Yellowjacket uses scent, posture, and vocal signals to mark territory and coordinate social behaviour.
• Communication intensity often peaks during breeding seasons and territorial disputes.

Habitat & range

Woodlands, gardens, and urban areas

Ecological role

Yellowjacket participates in pollination, decomposition, or prey-base support for birds and other insectivores.

Conservation status of the Yellowjacket

Sources & references

This guide is compiled and reviewed against established zoological and conservation references. Key sources for the Yellowjacket:

• IUCN Red List of Threatened Species

  Conservation status (Least Concern) reflects the IUCN Red List category for Vespula vulgaris.

• iNaturalist — observations & photos

  Search citizen-science observations and community IDs for Vespula vulgaris. Useful for range checks and recent sightings — not a substitute for formal Red List status.

• GBIF — occurrence data

  Global Biodiversity Information Facility species search for Vespula vulgaris. Explore published occurrence records used in range research.

• IUCN Red List — Vespula vulgaris.

  Conservation status (Least Concern) and population trends.

• Animal Diversity Web — Vespula vulgaris. University of Michigan Museum of Zoology.

  Life history, morphology, and range.

• Wikipedia — Yellowjacket.

  General taxonomy and overview (cross-check primary sources).

• Global Animal Guide editorial standards

  How we research, source, review, and update every guide for accuracy.