Are Yellow-Legged Hornets in York County, SC? What Local Homeowners Should Know

If you live in York County or the greater Charlotte area, you may have heard recent warnings about the invasive yellow-legged hornet. These hornets have now been confirmed in South Carolina and North Carolina, and state officials are asking homeowners, beekeepers, and pest-control professionals to remain alert.

That does not mean every large hornet or unusual nest in your yard is a yellow-legged hornet. Several native insects are commonly mistaken for them. It does mean suspicious activity should be taken seriously, photographed from a safe distance, and reported to the appropriate state agency.

Here is what homeowners in York, Rock Hill, Clover, Lake Wylie, Fort Mill, Waxhaw, Lancaster, and surrounding communities need to know.

Are Yellow-Legged Hornets in York County?

Yes. A yellow-legged hornet nest was discovered and removed in York County in late 2025 after a beekeeper reported hornets preying on honeybees near his hives.

The discovery was especially concerning because it occurred more than 150 miles from the previously known area of activity along the coast. According to Clemson Extension, the nest had already entered its reproductive stage and was producing new queens. More than 400 queens were destroyed with the nest, but officials could not rule out the possibility that some had already dispersed.

Clemson University’s September 2026 yellow-legged hornet update shows that monitoring has expanded throughout the region.

As of September 16, 2026:

• Approximately 1,410 traps were operating in Clemson’s York District.

• Traps were being monitored in York, Chester, Lancaster, Cherokee, and Union counties.

• Two embryo nests and one primary nest had been removed in the Upstate.

• Clemson and USDA personnel were continuing to monitor traps, follow hornet activity, and locate nests.

The map does not mean yellow-legged hornets are present at every marked location or throughout every monitored county. The traps are part of a broader detection effort centered around known activity, honeybee colonies, and areas where additional monitoring is needed.

Yellow-Legged Hornets Have Also Been Confirmed in North Carolina

This is no longer strictly a South Carolina concern.

As of August 2026, the North Carolina Department of Agriculture and Consumer Services had confirmed yellow-legged hornet detections in Union and Guilford counties.

Confirmed activity on both sides of the state line makes awareness especially important for communities throughout York County, Union County, and the greater Charlotte region.

There is no reason to panic, but accurate identification and prompt reporting matter. Early detection gives state response teams a better chance of locating and removing a nest before new queens disperse and establish additional colonies.

What Does a Yellow-Legged Hornet Look Like?

The yellow-legged hornet, scientifically known as Vespa velutina, is an invasive hornet native to Southeast Asia. Adults are approximately one inch long.

Look for these identifying characteristics:

• A mostly black or very dark brown thorax

• A dark abdomen that becomes lighter toward the end

• Yellow or orange markings on the abdomen

• A dark head with yellow or orange coloring on the face

• Legs that are dark near the body and distinctly yellow toward the ends

• Dark-colored wings

• An overall darker appearance than many familiar local wasps

The yellow lower portions of the legs are one of the hornet’s most recognizable features, but identification should not be based on leg color alone. Lighting, movement, and distance can make colors difficult to judge.

A clear photograph is the safest and most useful way to help experts determine what you have found.

What Insects Are Commonly Mistaken for Yellow-Legged Hornets?

We receive plenty of calls about stinging insects, and identification is not always as simple as people expect. Paper wasps, European hornets, bald-faced hornets, yellowjackets, and cicada killers can all look alarming when they appear around a home.

Clemson highlighted the Eastern cicada killer as a common look-alike in its September update. Cicada killers are large wasps with black bodies, broken yellow abdominal markings, and reddish-brown wings. They commonly dig burrows in lawns, garden beds, sandy soil, and areas along sidewalks.

Despite their size, cicada killers are solitary wasps rather than colony-forming hornets. Males may fly aggressively around people, but they cannot sting. Females can sting, although they are generally not aggressive unless handled or threatened.

Native stinging insects can still create legitimate safety concerns when they nest near doors, decks, mailboxes, play areas, or other frequently used spaces. However, finding a large wasp does not automatically mean an invasive yellow-legged hornet is present.

Why September Is an Important Time to Watch for Yellow-Legged Hornets

The yellow-legged hornet’s behavior changes throughout the year, and September begins one of the most consequential stages in its life cycle.

A single overwintering queen emerges during the spring and begins building a small embryo nest. She raises the first workers herself. As those workers mature and the colony grows, they take over much of the nest construction and foraging while the queen concentrates on laying eggs.

The colony may then move into a larger primary nest. By late summer, it can relocate again and construct a much larger secondary or terminal nest, which is often positioned high in a tree canopy.

During August and September, that secondary nest is expanding and the colony begins producing reproductive females, called gynes, along with reproductive males. Through the fall, new queens mate and leave the nest. Fertilized queens may shelter in leaf litter, wood piles, containers, equipment, or other protected places before emerging the following spring to begin new colonies.

This is why finding and reporting a suspected nest during early fall is so important. Removing a nest through the proper state response process before its reproductive queens disperse may prevent multiple colonies from developing the following year.

Yellow-legged hornet colonies can continue growing well into the fall, so homeowners should remain observant even as temperatures begin to cool.

What Do Yellow-Legged Hornet Nests Look Like?

Yellow-legged hornets may build and occupy multiple nests during a single year.

Embryo nests

An overwintering queen begins with a small embryo nest during the spring. These early nests may be about the size of a tennis ball and can be found on structures, beneath sheltered overhangs, or within dense vegetation.

Primary nests

As the colony develops, it may move into a larger primary nest. These nests can become approximately volleyball-sized and may still be located relatively close to the ground or around human structures.

Secondary or terminal nests

Later in the summer, the colony may relocate into a much larger secondary nest. These nests are often built high in tree canopies, although they may also be found on structures or concealed within dense foliage such as palm fronds.

A mature secondary nest can become larger than a basketball and contain hundreds of workers. Homeowners may notice hornet activity before they ever see the nest itself.

Yellow-legged hornet nests may be partially concealed by dense foliage, including palm fronds. Never approach or disturb a suspected nest.

Why Are Yellow-Legged Hornets a Serious Concern?

The greatest concern is their effect on honeybees and other pollinators.

Yellow-legged hornets engage in behavior known as “hawking.” They hover near the entrance of a beehive and capture honeybees as the bees leave or return. Multiple hornets may target the same colony.

The continued presence of predators outside the hive can prevent honeybees from foraging normally. Over time, the colony may struggle to collect enough food, raise replacement workers, and build the reserves it needs to survive the winter.

This threat extends beyond honey production. Honeybees and native pollinators play an important role in agriculture and the reproduction of flowering plants throughout our region.

Yellow-legged hornets can also create a safety concern around homes. Clemson reports that their colonies may contain far more workers than the nests of many native stinging insects.

The venom is not believed to be more potent than that of our native wasps or hornets. The concern is the number of insects that may defend a large colony if the nest is disturbed.

Where Might Homeowners Notice Activity?

You do not need to conduct a risky search for a nest. Simply pay attention to unusual insect activity while spending time around your property.

Possible locations include:

• Shrubs and thick vegetation

• Tree canopies

• Rooflines, overhangs, sheds, and other structures

• Hummingbird feeders

• Trash cans and outdoor waste areas

• Areas containing ripe or fallen fruit

• Flowering plants where insects are feeding

• Properties near honeybee colonies

• Trailers, equipment, vehicles, or stored materials arriving from affected areas

Beekeepers should be especially watchful for dark hornets hovering near hive entrances and capturing bees in flight.

What Should You Do If You See a Suspected Yellow-Legged Hornet?

Do not approach the insect or attempt to remove the nest.

Instead:

1. Move people and pets away from the immediate area.

2. Take a clear photograph from a safe distance.

3. Record the location and date of the sighting.

4. Note where the insect was seen and what it was doing.

5. Submit the photograph through the appropriate state reporting system.

Photographs are essential. State officials need a clear image to determine whether the insect is a yellow-legged hornet or one of the native species commonly mistaken for it.

South Carolina sightings should be submitted through the Clemson Yellow-Legged Hornet Reporting Tool.

North Carolina residents can find identification information and the state reporting link on the NCDA&CS Yellow-Legged Hornet resource page.

Do Not Try to Remove a Suspected Nest Yourself

Clemson specifically advises homeowners not to remove suspected yellow-legged hornet nests.

Destroying only the visible portion of a nest could scatter the colony or allow reproductive queens to escape. Clemson’s Yellow-Legged Hornet Response Team uses trapping, bait stations, marked hornets, and flight tracking to locate nests and manage them through the proper response process.

This is different from treating a typical wasp or hornet nest around a home. A suspected invasive hornet should be documented and reported so the appropriate state team can investigate it.

What If It Is a More Common Wasp or Hornet?

Most stinging insects found around local homes will still be native or previously established species rather than yellow-legged hornets.

That does not mean you should ignore a nest in a dangerous location. Yellowjackets nesting beside a walkway, paper wasps beneath a frequently used deck, or hornets near a play area can create an immediate concern for your family.

This is where experience matters. Treating stinging insects begins with identifying the insect, locating the nest when possible, and selecting an approach appropriate for the species and nesting location. Spraying at insects as they fly past rarely addresses the source of the problem and may make the situation more dangerous.

Freedom Pest Services provides professional stinging-insect identification and control throughout York County, SC and the greater Charlotte-metro area.

If we believe an insect may be an invasive yellow-legged hornet, the responsible next step is to help ensure it is reported to the correct state agency rather than treating it like an ordinary household pest.

Awareness Is Our Best First Line of Defense

Yellow-legged hornets are now a legitimate regional concern, but homeowners do not need to assume every large wasp is an invasive hornet.

Learn the basic identifying features. Watch for unusual activity. Photograph suspicious insects or nests without getting too close. Most importantly, report possible sightings so trained specialists can determine what you have found.

The sooner a yellow-legged hornet colony is located, the better the chance of removing it before additional queens can spread.

If you are dealing with wasps, hornets, yellowjackets, bees, or another stinging insect around your home and are unsure what you are seeing, contact Freedom Pest Services. Our experienced team can help you determine the safest and most appropriate next step.

Contact Freedom Pest Services today.

📞 Call: (843) 972-7705

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