Learn how to identify bald-faced hornets, understand why they can become a concern for Connecticut homeowners, and know when it may be time to contact a licensed pest control professional like Richland Pest & Bee Control.
Bald-faced hornets are among the most recognizable stinging insects found throughout Connecticut. Despite their common name, bald-faced hornets are not true hornets. They are actually a type of aerial yellow jacket known for their distinctive black-and-white coloration and large, enclosed paper nests.
Bald-faced hornets play an important role in the ecosystem by helping control populations of flies, caterpillars, and other insects. However, because they aggressively defend their nests, they can become a serious concern when colonies establish themselves near homes, decks, walkways, playgrounds, and other areas of frequent activity.
Bald-faced hornets have a unique appearance that makes them easier to identify than many other wasps.
Common characteristics include:
● Approximately ½ to ¾ inch long
● Black bodies with bright white markings
● White or ivory-colored patches on the face
● White bands near the tip of the abdomen
● Smooth bodies with very little hair
● Rapid, direct flight patterns
Because of their striking coloration, they are less likely to be confused with honey bees or paper wasps than other stinging insects.
The name “bald-faced hornet” comes from the large white markings that cover much of the insect’s face, giving it the appearance of having a “bald” face.
Although they are called hornets, they are more closely related to yellow jackets and share many of the same defensive behaviors
Bald-faced hornets construct large, enclosed paper nests using chewed wood fibers mixed with saliva.
Common nesting locations include:
● Trees and large shrubs
● Roof overhangs
● Decks and porches
● Sheds and garages
● Utility poles
● Dense vegetation
● Play structures
● Corners of buildings
● Decorative landscaping
Their nests are often football-shaped or teardrop-shaped and may range from the size of a baseball early in the season to more than two feet in length by late summer.
Unlike paper wasps, whose nest cells remain exposed, bald-faced hornets completely enclose their nests within a papery outer shell.
Bald-faced hornet activity changes throughout the year.
Overwintering queens emerge and begin constructing small starter nests while laying the first generation of eggs.
The first workers emerge and assume responsibility for nest expansion, foraging, and caring for developing larvae.
Colonies reach their maximum size and activity peaks. Nests may contain several hundred workers, and hornets become increasingly defensive around their colonies.
New queens and males are produced and mate before winter arrives. Most workers and the original queen die with the first hard frosts, while newly mated queens seek protected locations to overwinter.
Because nests continue growing throughout the season, a nest that appears small in June can become quite large by September.
Bald-faced hornets are considered one of the more defensive stinging insects found in Connecticut.
They can:
● Sting multiple times
● Respond quickly to perceived threats
● Release alarm pheromones that attract other workers to defend the nest
● Pursue intruders for considerable distances if the colony is disturbed
For most people, stings cause:
● Immediate pain
● Redness
● Swelling
● Burning sensations
● Localized irritation
However, severe allergic reactions can occur and require emergency medical attention.
Seek immediate medical care if someone experiences:
● Difficulty breathing
● Swelling of the face or throat
● Dizziness or fainting
● Rapid heartbeat
● Widespread hives
● Signs of anaphylaxis
Multiple stings may also require medical evaluation, particularly in children, older adults, and pets.
If you discover a bald-faced hornet nest on your property, it is best to leave it undisturbed.
Do not attempt to:
● Throw objects at the nest
● Knock it down
● Spray it without proper knowledge and equipment
● Burn the nest
● Pressure wash the structure
● Approach the nest closely for photographs
Instead:
● Keep children and pets away from the area.
● Identify and avoid the hornets’ flight paths.
● Warn family members and visitors about the nest location.
● Observe activity from a safe distance.
● Consider contacting a licensed pest professional if the nest is located near areas of regular use.
Because bald-faced hornets aggressively defend their nests, do-it-yourself removal attempts can significantly increase the risk of multiple stings.
Homeowners may notice several indicators that a nest is nearby.
Common signs include:
● Large black-and-white wasps flying around the property
● Football-shaped gray paper nests
● Repeated activity entering and exiting a single opening in the nest
● Increased activity around trees and shrubs
● Rapid movement near rooflines and overhangs
Early detection may help reduce accidental encounters as colonies grow.
Although it is not always possible to prevent bald-faced hornets from nesting, a few steps may help reduce the likelihood of activity around the home.
Helpful prevention measures include:
● Inspect trees and structures regularly during the spring.
● Trim dense vegetation near frequently used areas.
● Monitor rooflines, sheds, and playsets for developing nests.
● Limit attractants such as open food and sugary drinks outdoors.
● Address small starter nests promptly when it is safe and practical to do so.
Routine inspections can help identify nesting activity before colonies reach their peak size.
MOST ACTIVE
During warm daylight hours
COMMON AREAS
Eaves, attics, decks, and yards
MAIN CONCERNS
Stings, nests, allergic reactions
LOCAL SERVICE
West Hartford and surrounding CT Communities
Click through the questions below to learn more about beetle pest control and treatment options from Richland Pest & Bee Control. If you have any additional questions, feel free to reach out by contacting us online, or giving us a call at 1-800-308-9126.
No. Bald-faced hornets are actually a type of aerial yellow jacket, despite their common name.
They are generally not aggressive while away from the nest, but they are highly defensive if their colony is disturbed.
No. Colonies build new nests each year, although favorable nesting locations may attract future queens.
Yes. Like other yellow jackets, bald-faced hornets can sting repeatedly because they do not lose their stingers.
Yes. They help control populations of other insects and contribute to the balance of local ecosystems.
Bald-faced hornets are fascinating insects that serve an important role in nature by helping regulate other insect populations. However, their large nests and highly defensive behavior can create safety concerns when colonies establish themselves near homes and outdoor living spaces. Understanding how to identify bald-faced hornets, recognize their distinctive nests, and respond appropriately when activity is discovered can help homeowners make informed decisions and reduce the risk of unwanted encounters around their property.
