ANN ARBOR, MIANN ARBOR, MIBald faced hornets are large black and white social wasps that build enclosed paper nests in trees, shrubs, eaves, and other elevated locations. They are native predators, but an active colony can become a safety problem when the nest is close to a doorway, walkway, deck, play area, or work zone.
Honorable Pest Control provides identification, active nest assessment, targeted treatment, and nest removal when removal is appropriate and safely accessible. The response depends on nest activity, location, access, and how people use the surrounding area.
Bald faced hornets are not true hornets. They are aerial yellowjackets. Correct identification matters because paper wasps, ground nesting yellowjackets, European hornets, carpenter bees, and solitary wasps use different nesting sites and may require different responses.
Bald faced hornets can strongly defend an active colony and females can sting more than once. That does not mean every visible nest requires treatment. A nest high in a tree and away from normal activity may be avoidable, while a nest beside a front walk, deck, mailbox, playground, or frequently maintained shrub can create repeated contact risk.
Michigan State University describes bald faced hornets as more defensive when their nest is disturbed, while extension guidance also recognizes them as beneficial predators. The decision should be based on actual nest location and exposure rather than fear alone.
In Michigan, overwintered queens begin new colonies in spring. Nests grow through summer and mature colonies can contain hundreds of wasps. Activity is often most noticeable in mid to late summer when the paper nest has become large enough to see.
The colony is annual. Most of the colony dies with cold weather, while newly fertilized queens overwinter elsewhere and start new nests the following year. Old abandoned nests are not reused.
The technician reviews the wasps, nest shape, flight pattern, and surrounding activity so a bald faced hornet nest is not confused with another stinging insect problem.
Nest height, location, nearby doors and walkways, landscaping, ladders, power lines, and normal use of the area affect the service plan.
A product and application method labeled for the pest and site may be used to address the active colony. Method and timing depend on access, weather, and label directions.
The technician explains what activity may continue after service and whether the nest should be rechecked before removal or other work occurs around it.
Removal may be useful after the colony is inactive when the nest is accessible and removal is included in the approved scope. High or unsafe nests may require a different plan.
Treatment is not instant elimination of every worker, queen, or developing insect. The goal is to address the active colony and verify the result from remaining activity.
If someone is stung and develops difficulty breathing, swelling of the face or throat, dizziness, or another severe reaction, seek emergency medical care. Pest control service addresses the insect problem, not sting diagnosis or treatment.
The same paper nest is not reused the following year, but new queens can build another nest on the property. No treatment can guarantee that another bald faced hornet will never choose a suitable tree, shrub, eave, or other location in a future season.
Prevention is mainly monitoring. Watch areas where nests have appeared before and identify new nests early when they are close to people. Decoy paper nests are not proven prevention because extension guidance does not show clear evidence that they reliably stop nesting.
This page stays specific to bald faced hornets and exposed aerial paper nests. The broader wasp, hornet, and bee control page is the better starting point when the species is uncertain or activity may involve yellowjackets, paper wasps, bees, or another stinging insect.
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The current Honorable Shield information lists wasps among covered pests. Confirm nest specific terms before relying on recurring plan coverage.
They can strongly defend an active nest when people, pets, equipment, or landscaping activity gets too close. Risk depends heavily on nest location and disturbance.
Mature paper nests can become large and may contain hundreds of workers. Treatment decisions should be based on activity, location, and access rather than size alone.
No. The colony is annual and the old paper nest is not reused the following year. Newly fertilized queens overwinter separately and build new nests in spring.
If a nest is confirmed inactive after the colony has died out, pesticide treatment is generally not needed simply because the old paper structure remains. It can be removed for appearance or access when that can be done safely.
Not necessarily. Removal depends on nest height, access, surrounding hazards, treatment timing, and the approved service scope.
The current Honorable Shield information lists wasps among covered pests. Confirm current written terms and any nest specific conditions before relying on recurring plan coverage for an active bald faced hornet nest.
If you have found an active gray paper nest near a doorway, walkway, deck, yard work area, play space, or another place people cannot reasonably avoid, Honorable Pest Control can identify the insect and explain the treatment and removal options that fit the property.