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Swarming termites are often the first sign of a potential infestation. When you see winged termites around your home, it usually means a mature colony is nearby and looking to expand. But when do termites swarm, and what does it mean for your property?
A termite swarm happens when reproductive members of a colony, called alates, leave to start new colonies when the colony gets too large. You might spot them flying around lights or windows, or find piles of discarded wings near your doors.
Swarming is part of the termite life cycle. It usually happens once a colony reaches maturity, which can take several years. The presence of flying termites is often when homeowners first realize there's an issue.
When do termites swarm? Most species swarm during warmer months, often after rain, when the air is humid. For many parts of the U.S., that’s spring and summer. But it also depends on where you live and what type of termite you're dealing with.
Subterranean termites usually swarm in spring, often on warm days following rain. In warmer climates, they may swarm again in late summer or even fall. These swarms often happen during the day or at dusk, depending on the species, and can be quite large.
Drywood termites tend to swarm in late summer or early fall, especially in coastal or southern regions. Their swarms are usually smaller and can happen indoors, especially around light sources.
Dampwood termites are more selective. They generally swarm in late summer, often at dusk, and prefer damp or decaying wood. These termites are less common in homes but can still be a problem in moist or poorly ventilated areas.
Swarming often happens in wooded, humid areas, especially along the West Coast.
If you see flying termites around your home, close windows and doors, and turn off outdoor lights that may attract swarmers. Swarming may be a sign of a larger issue inside walls or woodwork. For long-term termite control, a full inspection is the best next step.
Termites tend to be more active in warmer months when temperatures rise and moisture increases. The termite swarm season is usually spring or summer, depending on the species and region.
Most termite species swarm once their colony is mature, which can take several years. However, some swarms are small and can go unnoticed depending on the species and environmental conditions.
Swarms are usually short, often lasting less than an hour. Still, multiple swarms may occur over several weeks during peak swarming periods.
Yes. Especially with drywood termites, indoor swarms can occur when colonies form within walls or furniture. They’re often seen near windows, vents, or light fixtures.
Termites are active year-round, but their behavior changes with the seasons. In warmer months, they build and forage more aggressively. In colder months, activity slows but doesn’t stop, especially indoors.
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