Are yellowjackets found in New Hampshire?

Yes — yellowjackets are among the most common stinging insects in New Hampshire. Several Vespula and Dolichovespula species are established here, with colonies growing through summer and reaching peak size and aggression in August through October. For species breakdown and NH timing, see the full yellowjacket guide.

Yellowjacket vs. paper wasp vs. hornet — what is the difference?

Yellowjackets are stocky with legs tucked in flight and build concealed nests. Paper wasps are slimmer, dangle long legs, and build an open umbrella comb. Bald-faced hornets are larger and black-and-white with a big enclosed gray nest. All three can sting, but yellowjackets are the most aggressive foragers at food. See the full guide for a side-by-side comparison.

Why are yellowjackets so aggressive in late summer?

By late summer a yellowjacket colony can hold hundreds or thousands of workers, and the natural insect food supply declines, pushing them to seek sweets, protein, and human food. Queen-rearing also ends, freeing workers to forage and defend more aggressively. Cold nights trigger final colony buildup before the frost kills the nest. The full guide covers late-season behavior and what to do.

Should I treat a yellowjacket ground nest myself?

Ground and void nests are high-risk to treat without protective equipment. Disturbing the entrance triggers a rapid defensive swarm. Professional same-day treatment is the safest route, especially for nests near walkways or play areas. For treatment options and DIY cautions, see the full yellowjacket guide, or contact Anchor for a free quote.

Yellowjacket · Vespula spp. and Dolichovespula spp.

Stinging InsectsNH resident

Yellowjacket — Quick ID for New Hampshire Homeowners

Also called Yellow jacket · Meat bee

Yellowjackets are stocky black-and-yellow colony wasps that nest in concealed spots — ground burrows, wall voids, and under decks. They are NH's most aggressive late-summer stinger. This is the fast identifier; for nest removal, sting safety, and late-summer behavior, see the full Yellowjackets guide.

At a glance

Size: 10–16 mm; stocky; Vespula and Dolichovespula spp.
Nest: Hidden — ground, void, or under deck; never open like paper wasp
Peak aggression: Late summer; large colony, food-competing
Sting: Repeated; no barb lost; can sting multiple times

The short of it

Is it a yellowjacket?

Yellowjackets are NH's most aggressive late-summer stinger and the wasp most likely to crash your cookout or nest inside your wall. Their concealed nests in the ground or wall voids make them especially hazardous to disturb without proper equipment.

This page is a fast identifier. For nest removal, sting safety, and late-season behavior, see the full Yellowjackets guide linked above.

Identify it

Quick yellowjacket ID

A few features immediately distinguish yellowjackets from the paper wasps and hornets they're often confused with.

Species profile

Yellowjacket

Scientific name: Vespula spp. and Dolichovespula spp.
Family: Vespidae
Size: 10–16 mm
Coloration: Crisp black and bright yellow banded abdomen; no hair; shiny
Habitat: Ground burrows, wall and soffit voids, under decks, sheds, in trash receptacles
Active season: Spring colony founding through first hard frost (peak late summer)
Diet: Protein (insects, meat, carrion) for larvae; adults also seek sweets and sugary drinks
Lifespan: Colony lives one season; only fertilized queens overwinter

Common throughout New Hampshire; peak colony size and activity late July through October.

The tells — key ID features

Stocky, compact body — chunky compared to the slim-waisted paper wasp — with legs tucked in fast flight.
Crisp bright yellow and black banding; shiny, no hair.
Concealed nest: in the ground, a wall void, or under a deck/shed — never an open comb.
Bold at outdoor food and drinks; stings repeatedly without losing a barb.

Is it actually this? — the confusion species

Paper wasp

How to tell — Paper wasps are slimmer with a narrow pinched waist, dangle long legs in flight, and build an open umbrella comb — no outer shell.

Bald-faced hornet

How to tell — Bald-faced hornets are larger and black-and-white, and build a distinctive enclosed gray football nest in trees or eaves.

What you'll notice

Signs of a problem

Watch for steady traffic at a hidden entry point.

Steady wasp traffic flying in and out of a ground hole or a gap in siding, soffit, or deck

What it means — Concealed yellowjacket nest below or inside — colony is established.

Wasps swarming a soda can, grill, or trash bin in late summer

What it means — Foraging yellowjacket workers — a colony is somewhere nearby.

When it's past DIY

Yellowjacket removal in New Hampshire

Yellowjacket nests in walls, voids, and the ground are best handled by a professional — disturbing a concealed nest triggers mass defensive stinging. Same-day service is available across southern NH. The full guide covers nest types, removal options, and sting safety.

Signals it's past DIY

When to call a pro

A nest is in the ground, a wall void, or near an entry point.
Aggressive activity near people or pets, especially in late summer.
Anyone in the household has a known stinging-insect allergy.
You cannot locate the nest entrance safely.

Not sure it's a yellowjacket?

A licensed NH technician can confirm the species and tell you honestly whether it's a DIY fix or a job for a pro — free inspection, same-day service across Southern New Hampshire.

Get a Free Inspection (603) 785-0118

Common Questions

Frequently asked questions

Sources(2)

[1]
UNH Cooperative Extension — Yellowjackets
NH presence, biology, sting behavior
extensionverified 2026-06-30
[2]
Anchor Pest — Yellowjackets Guide
full NH identification, removal, sting safety
industryverified 2026-06-30

Written & reviewed by

Verified

Daniel Brady

NH-Licensed Pesticide Applicator · License #782664 (NHDAMF, RSA 430)

Daniel Brady is the New Hampshire–licensed applicator behind Anchor Pest Services, a family-owned pest control company serving the Manchester area since 2017.

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Last updated 2026-06-30

New Hampshire pest control

Dealing with yellowjackets in your home?

Anchor Pest Services identifies and handles yellowjacket problems across southern and central New Hampshire. Family-owned since 2017, NH license #782664.

Get a Free Inspection (603) 785-0118

NH-licensed applicators (#782664)
Same-day service · free inspection
Family-owned since 2017

Keep Exploring

Yellowjacket — Quick ID for New Hampshire Homeowners

Is it a yellowjacket?

Quick yellowjacket ID

The tells — key ID features

Paper wasp

Bald-faced hornet

Signs of a problem

Steady wasp traffic flying in and out of a ground hole or a gap in siding, soffit, or deck

Wasps swarming a soda can, grill, or trash bin in late summer

Yellowjacket removal in New Hampshire

Not sure it's a yellowjacket?

Frequently asked questions

Dealing with yellowjackets in your home?

Your next step

Can yellowjackets build nests inside walls?

Ground Wasps in NH — What's Nesting in Your Lawn?

Paper Wasp — Quick ID for New Hampshire Homeowners

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What happens if you leave a wasp nest in place?