Long Island Exterminators

Termites

A sunny April morning after a rainy weekend, and dozens of small black insects with long wings are crawling on the inside of the basement window. Long Island termite companies say that is exactly when and how a subterranean termite colony shows itself.

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No. 1TermiteReticulitermes flavipes

The termite in Long Island houses is the eastern subterranean termite, Reticulitermes flavipes. Advanced Pest Management, which works out of Garden City, says it is the only species that produces real swarms here. The colony lives in the soil and travels up into the wood of the house, so the damage is usually out of sight.

Three kinds of termite in one colony

The Connecticut Agricultural Experiment Station describes the castes:

  • Workers. Pale, soft, blind and wingless. People sometimes call them white ants.
  • Soldiers. Like workers but with large jaws, there to defend the colony.
  • Swarmers. Dark brown or black with wings. They leave the colony to mate and start new ones.

When termites swarm on Long Island

The experiment station gives the season as March through June. Advanced Pest Management narrows it for Long Island and Queens: swarms start in late March, peak in April and taper off through May, with early June possible after a cold spring. The company says its first indoor swarm calls come from Queens around March 22, from Nassau about a week later, and from Suffolk a week after that.

What sets a swarm off, by Advanced’s account:

ConditionWhat to watch for
Soil temperatureHigh 50s to mid 60s
RainA soaking rain that saturates the soil
The day afterWarm and sunny, usually 65 degrees or warmer
Time of dayOften late morning

Termite or flying ant

Winged carpenter ants come out in spring too. Three things tell them apart:

FeatureTermite swarmerFlying ant
AntennaeStraight and beadedBent at an elbow
WaistThick, no pinchNarrow, pinched waist
WingsFour wings the same length, longer than the bodyFront wings longer than the back pair

Source: Connecticut Agricultural Experiment Station and Advanced Pest Management. The experiment station adds one more clue in the wood itself: carpenter ant galleries are clean and leave piles of speckled sawdust, while termite galleries are lined with soil and leave no sawdust.

Signs of termites without a swarm

Advanced Pest Management and Knockout Pest Control in Uniondale list the signs they find in Long Island houses:

  • mud tubes about as wide as a pencil, running up foundation walls, posts, sill plates and pipes
  • wood that sounds hollow or papery when you tap it
  • piles of shed wings on window sills, in light fixtures or along baseboards
  • eaten wooden tack strips under basement carpet
  • damage behind wood paneling in a finished basement
  • paint on wood trim that cracks or bubbles with no moisture problem behind it

The experiment station explains why it hides so well: termites eat along the grain and avoid breaking through the surface, so a board can look fine from outside and be hollow inside.

What to do next

Sweep up or bag a few of the swarmers so a company can see them. Then book an inspection. Knockout recommends a professional inspection in spring, before the season peaks. When you are ready to compare prices for liquid treatment and bait stations, our termite treatment page lays out what Long Island companies charge.

Termite companies on Long Island

Companies based in Nassau and Suffolk. For termite work, look for category 7c in the company's NYSDEC record.

Termite identification questions

Do termites swarm in the fall on Long Island?

The Connecticut Agricultural Experiment Station says eastern subterranean termites swarm from March through June, occasionally on a warm winter day as early as January, and not in summer or fall.

How fast do termites damage a house?

Slowly. The experiment station says a colony eats through about one square foot of wood a year on average, which is why damage often goes unnoticed for years.

What does a termite swarmer look like?

Dark brown or black, with straight beaded antennae, a thick waist and four wings of equal length that reach past the body, according to the experiment station and Advanced Pest Management.

Are termites common on Long Island?

Knockout Pest Control in Uniondale calls subterranean termites the species most common on Long Island and says activity surges across Nassau and Suffolk every spring.

Sources (3), checked October 2026
  1. Connecticut Agricultural Experiment Station, Eastern Subterranean Termite fact sheet
  2. Advanced Pest Management (Garden City and Glendale), Termite Swarm Season on Long Island and Queens (May 3, 2026)
  3. Knockout Pest Control (Uniondale), 5 Signs You Might Have Termites (Mar 11, 2026)
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