Are bald-faced hornets actually hornets?

No, despite the name, bald-faced hornets are not true hornets. They are aerial yellowjackets in the genus Dolichovespula, more closely related to common yellowjackets than to true hornets. The 'hornet' label comes from their larger size compared to most wasps. This distinction matters because their behavior, nest construction, and lifecycle follow the yellowjacket pattern.

Are bald-faced hornet stings dangerous?

For most people, a bald-faced hornet sting causes intense localized pain, redness, and swelling that resolves within 24 hours. For people with insect-sting allergies, stings can trigger severe systemic reactions including anaphylaxis, which requires emergency medical treatment. Unlike honey bees, bald-faced hornets do not lose their stinger and can sting multiple times in a single defensive episode. If someone experiences difficulty breathing, throat swelling, hives away from the sting site, or dizziness after a sting, call 911 immediately.

Should I try to remove a bald-faced hornet nest myself?

Generally, no. Bald-faced hornets aggressively defend their nests and can sting multiple times. DIY removal attempts are responsible for a substantial portion of stinging-insect-related ER visits each summer. The combination of working at height, working at night with poor visibility, and being swarmed by hundreds of defensive insects creates real injury risk. Professional removal, done with proper protective equipment, the right products, and at the right time of day, is significantly safer.

Will bald-faced hornets reuse the same nest next year?

No. Bald-faced hornet colonies are annual. The entire worker population and the founding queen die in late fall when temperatures drop. Only newly mated queens survive the winter, and they always start fresh nests in new locations the following spring. An old nest can be safely removed in winter, but a new nest may appear nearby the next season if your property has good nesting conditions.

Does the All Seasons Pest Plan cover bald-faced hornet nest removal?

Yes. Stinging insect nest removal, including bald-faced hornets, yellowjackets, paper wasps, and European hornets, is covered under Interstate Pest Management's All Seasons Pest Plan. Coverage includes assessment, safe removal using appropriate equipment, and treatment of nest sites to deter rebuilding.

When are bald-faced hornets most active?

In the Pacific Northwest, bald-faced hornet colonies are founded by overwintered queens in spring (April–May), grow through summer, and peak in size from late July through September, when colonies can contain 100 to 400 workers. Late summer is also when they become most aggressive defending the mature nest. By late October or early November, the colony has died off and only new queens fly to overwintering sites.

How do I tell bald-faced hornets apart from yellowjackets and paper wasps?

Bald-faced hornets have a black-and-white pattern; yellowjackets and paper wasps are yellow-and-black. Bald-faced hornet nests are large, grey, enclosed footballs hanging in the air; yellowjacket nests are typically in the ground or in wall voids; paper wasp nests are small, open-celled, umbrella-shaped, and visible underneath. If the insect is mostly black with a white face and the nest is a hanging grey football, it's a bald-faced hornet.

Bald-faced hornet (Dolichovespula maculata) close-up showing the distinctive black body with ivory-white facial markings, the aerial yellowjacket species responsible for grey football-shaped nests in Oregon and Washington trees and eaves — Bald-faced hornet (*Dolichovespula maculata*), workers 12–15 mm.

Bald-Faced Hornets

Reviewed by TJ, ACE Certified Technician · Updated 2026-05-19

Dolichovespula maculata | Category: Stinging Insects | ✓ Covered: All Seasons Pest Plan

If you’ve spotted a grey, papery football-shaped nest tucked into a tree, eave, or shrub, you’re looking at a bald-faced hornet nest, and it deserves your respect. These are the largest, most defensive wasps most Pacific Northwest homeowners ever encounter. They’re also one of the few pests we’ll plainly tell you not to handle yourself. Here’s how to identify them accurately, understand the actual sting risk, and figure out the safest next step.

Quick ID Card
Size	Workers 12–15 mm (about 1/2″); queens slightly larger
Color	Black with ivory-white face, thorax, and last 3 abdominal segments
Top ID Marker	Large grey, papery, football-shaped aerial nest
Active Season	Spring through fall; peak July–September
Nest Sites	Trees, shrubs, eaves, soffits, playground equipment, usually 3+ ft up
Colony Size	100–400 individuals at peak; nests die off each fall
Plan Coverage	✓ Covered under All Seasons Pest Plan

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Quick Answer: Bald-faced hornets (Dolichovespula maculata) are large (12–15 mm) black-and-white wasps, technically aerial yellowjackets, not true hornets, that build distinctive grey, football-shaped paper nests in Pacific Northwest trees, eaves, and shrubs. They are highly defensive of their nests in late summer (July–September), can sting multiple times, and inject venom that causes intense localized pain. For people with insect-sting allergies, stings can be life-threatening. DIY nest removal is responsible for a substantial share of stinging-insect ER visits each summer and is not recommended.

Key facts at a glance: Size: 12–15 mm · Color: black with white face · Nest: grey paper football, aerial · Multiple stings: yes · Anaphylaxis risk: yes (for allergic individuals) · Colony lifespan: annual · Reuses old nests: no · Plan coverage: Yes, All Seasons Pest Plan.

Safety note: If you or someone in your household has a known insect-sting allergy, treat any bald-faced hornet nest near the home as an urgent issue. Symptoms of anaphylaxis after a sting, difficulty breathing, throat swelling, hives away from the sting site, rapid pulse, or dizziness, are a medical emergency. Call 911. Use a prescribed epinephrine auto-injector if available.

What You Need To Know About Bald-Faced Hornets

Our ACE Certified Technician TJ breaks down bald-faced hornets, what they actually are, why their nests are different, and what to do if you find one.

Frequently Asked Questions

What do bald-faced hornets look like?

Large for a wasp, workers about 1/2″ long, black with bold ivory-white markings on the face, thorax, and last three abdominal segments. The white face is the easiest field tell. Their grey football-shaped nest is the giveaway from a distance.

Are they actually hornets?

No, they’re aerial yellowjackets (Dolichovespula maculata), not true hornets. The name comes from their larger size. Their behavior follows the yellowjacket pattern, not the European hornet pattern.

Are their stings dangerous?

For most people: intense pain and swelling that resolves in 24 hours. For people with insect-sting allergies: stings can trigger anaphylaxis and require emergency care. Unlike honey bees, bald-faced hornets can sting many times in a single defensive episode.

Should I remove the nest myself?

Honestly, no, not even with a can of wasp spray. Over-the-counter sprays often don’t reach hornets inside a mature nest and reliably provoke swarming. DIY removal is responsible for a substantial share of stinging-insect ER visits each summer. This is one of the few pests we tell people to leave alone.

Will they come back next year?

Not the same colony, entire bald-faced hornet colonies die in late fall. Only newly mated queens overwinter, and they always start fresh nests in new locations. But if your property has favorable sites, new queens may build nearby next spring.

Does my All Seasons Plan cover nest removal?

Yes, bald-faced hornets and all other stinging insects (yellowjackets, paper wasps, European hornets) are fully covered. Includes assessment, safe removal, and site treatment to deter rebuilding.

When are they most active?

Late July through September is peak. Colonies are largest, most defensive, and most likely to sting during this stretch. By late October the colony has died and only new queens remain.

How do I tell them apart from yellowjackets?

Color is the easy tell: bald-faced hornets are black and white; yellowjackets are yellow and black. Nest location is the other tell: bald-faced hornet nests hang in the air; yellowjacket nests are usually in the ground or in wall voids.

Signs You Have Bald-Faced Hornets

Most homeowners discover bald-faced hornets the same way: they see the nest. Here’s what to look for and what it tells you about the situation:

1. The grey paper football

The defining sign. Grey, papery, football- or teardrop-shaped, usually 3+ feet off the ground in a tree, shrub, eave, or soffit. Can reach the size of a basketball or larger.

2. Steady traffic at one entrance

A single entrance hole near the bottom of the nest with workers continuously coming and going. This is how you confirm it’s an active colony.

3. Black-and-white wasps near the nest

If the wasps are clearly black and white (not yellow and black) and they’re patrolling the area, it’s bald-faced hornets. The white face is visible at closer range.

4. Defensive responses to ground vibration

If hornets appear suddenly when you mow under a tree or trim a hedge, there’s a nest close by. Vibration is one of their primary threat triggers.

5. Nest size growing rapidly in July–August

If you noticed a small nest in June and it’s the size of a football by August, that’s normal, and it’s also the riskiest stretch. Late summer is peak defensiveness.

6. Wasps hunting other insects nearby

Bald-faced hornets are predators, they hunt flies and other wasps to feed their larvae. Watching one snatch a fly out of the air is a strong species clue.

Behavior, Biology & Lifecycle

Understanding the bald-faced hornet lifecycle is the single biggest help in deciding what to do, and when:

Annual colonies, one season only

A single overwintered queen starts a fresh nest each spring. The colony grows through summer, peaks in late summer, and the entire population dies off by late fall. Only newly mated queens survive winter, hidden in protected sites like leaf litter or wall voids.

The nest is chewed wood, not wax

Workers chew wood fibers and plant material into a paper-like pulp that builds the grey, layered envelope and internal combs. A fully mature nest can be over 14 inches across, well beyond what is in safely reachable range for a homeowner with a step stool.

Aerial yellowjacket, not true hornet

Dolichovespula maculata is in the same family as ground-nesting yellowjackets. They are not closely related to the European hornet. The name is historical, not taxonomic, their behavior follows the yellowjacket pattern, not the hornet pattern.

Predators that help, until they don’t

Bald-faced hornets are beneficial predators in the broader ecosystem, they hunt flies, other wasps, and pest insects to feed their larvae. The problem is location. A colony in a remote tree is doing useful work; a colony in your eave is a household risk.

Defensive range and triggers

They will defend the nest aggressively against anything they perceive as a threat within roughly 8–10 feet. Common triggers: ground vibration, rapid movement, dark colors, CO2 (breathing), and perfumes or scented products. Workers can sting multiple times.

Sting venom and allergy risk

For most people, a sting causes intense localized pain, redness, and swelling for 24 hours. For people with insect-sting allergies, a small but significant share of the population, stings can trigger systemic reactions including anaphylaxis. Carry an auto-injector if you’ve been prescribed one.

Homeowner Safety Steps

These steps are about safety until removal happens, not DIY nest removal.

Keep 15–20 ft of distance
Stay well outside their defensive range until removal. Slow movement is safer than fast movement if you do need to walk near the area.
Brief everyone in the household
Tell kids exactly where the nest is and to stay away. Move outdoor furniture out of the flight path. Keep pets indoors when near the area.
Don’t spray, hose, or strike the nest
Store-bought sprays usually fail and reliably provoke swarming. Hosing or hitting the nest with a stick has caused serious injuries. If you’ve already tried, retreat and call us.
If anyone has a sting allergy, prioritize
A documented insect-sting allergy in the household makes this an urgent issue. Confirm any auto-injectors are current. Request same-day or next-day service.
Save old nests for after they die off
If you find a nest in late fall or winter, the colony has died. Empty nests are safe to remove and won’t be reused. Live nests in spring through fall need professional removal.