Stinging Insect Season on Long Island
Every summer, Nassau and Suffolk County homeowners discover wasp, yellow jacket, or hornet nests on their properties — tucked under eaves, inside soffits, in attic vents, inside wall voids, in the ground near sidewalks, and in the ornamental shrubs around the house. Long Island's warm summers and abundant food sources (insects, caterpillars, ripe fruit) support robust stinging insect populations, and the county's mature housing stock and extensive landscaping provide nesting opportunities everywhere.
Understanding which stinging insects are active on Long Island, when colonies are most dangerous, and how to manage them safely can prevent the painful — and occasionally life-threatening — encounters that happen when nests are disturbed unknowingly.
The Main Stinging Insects in Nassau and Suffolk Counties
Yellow jackets (Vespula and Dolichovespula species): The most commonly encountered stinging insect problem on Long Island. Yellow jackets are small, black-and-yellow wasps that build paper nests either in the ground (ground yellow jackets — the most dangerous because they are easily disturbed by lawn mowing and foot traffic) or in aerial locations inside wall voids, attic spaces, and under eaves. Yellow jacket colonies grow through summer and reach peak size in August and September — when a single ground nest can contain several thousand workers who will defend the nest aggressively if disturbed.
Bald-faced hornets (Dolichovespula maculata): Despite being called hornets, these are technically large yellow jackets. They build the large, football-shaped gray paper nests that Long Island homeowners often find in trees, shrubs, or under eaves. Bald-faced hornets are highly defensive and will pursue perceived threats aggressively. Their nests can be spectacular — some exceed basketball size by late summer — and are genuinely dangerous to remove without professional equipment and protection.
European hornets (Vespa crabro): The only true hornet species in the US, significantly larger than yellow jackets, brown and yellow in coloration. European hornets build nests in hollow trees, attic spaces, wall voids, and occasionally in the ground on Long Island properties. They are active at night, which surprises homeowners when they find large insects flying around exterior lights after dark.
Paper wasps (Polistes species): Slender, brownish wasps that build small, open-celled umbrella-shaped nests under eaves, on window frames, in door frame corners, and in other sheltered exterior locations. Paper wasp colonies are smaller (dozens to a couple hundred workers) and generally less aggressive than yellow jackets, but will sting if the nest is touched or they feel threatened.
Why Late Summer Is the Danger Period on Long Island
Stinging insect colonies that were small and easy to overlook in May and June reach their maximum size in August and September on Long Island. A yellow jacket nest that had a few dozen workers in June may have thousands by August. This is also the time when natural food sources become scarcer, making yellow jackets more aggressive in seeking protein — they become particularly problematic around outdoor dining areas, garbage cans, and any exposed food.
Late August and September are when the most painful and dangerous stinging insect encounters happen on Long Island — when homeowners are still using their outdoor spaces but colonies are at their largest and most defensive.
Identifying a Nest on Your Long Island Property
In the ground: Watch for yellow jacket workers flying in and out of a small ground opening near the base of a shrub, in mulch beds, alongside sidewalks, or in the lawn. Avoid mowing near the opening. Ground nests can be extremely large below the surface.
In the structure: A steady stream of wasps entering and exiting through a gap in siding, a soffit vent, or around a window frame indicates an aerial nest inside the wall or attic. These in-wall nests can be very large and are among the most difficult to treat safely.
In trees or shrubs: Large gray football-shaped nests visible in tree canopies or shrub interiors are bald-faced hornet colonies. Do not approach, prune near, or disturb these nests without professional assistance.
Professional Wasp and Hornet Removal on Long Island
For any nest that is in a high-traffic area of your property, inside a structure, in the ground where foot traffic is likely, or larger than a baseball, professional removal is the appropriate choice. Disturbing a large yellow jacket nest or a bald-faced hornet nest without proper protective equipment results in immediate, multiple stings that are a genuine medical emergency for individuals with venom allergies.
Professional treatment is applied directly to the nest at the appropriate time — typically after dark when all workers are present — using professional-grade products that provide immediate knockdown of the colony.
Rest Easy Pest Control provides wasp, yellow jacket, and hornet removal throughout Nassau and Suffolk Counties. Call 888-927-9842 to schedule service.