Why Alabama Termite Season Starts in March — And What to Watch For

Termite swarm timing varies by species and weather. Swarmers indoors deserve an inspection; outdoor swarmers need identification and context. Save a sample or photo and avoid choosing a treatment from the calendar alone.

What is a termite swarm?

A swarm is the flight of winged reproductive termites looking for mates and places to start colonies. It is different from the feeding activity of workers. Removing swarmers does not address the colony that produced them, so report where they appeared as well as what they looked like.

The EPA's identification guide distinguishes termites from swarming ants: termite wings are roughly equal in length and the antennae are straight; ants have longer front wings and bent antennae. A specimen or clear photo can help a professional identify the insect.

When do termites swarm in Alabama?

Spring warmth and rain can bring noticeable swarming, but timing is not the same for every species or location. Alabama Extension describes warm, humid, calm conditions, often following rain. A particular week in March is not a reliable statewide start date.

Native subterranean termites and Formosan termites have different swarming patterns. Formosan swarmers often appear around lights in the evening. They are not limited to Alabama's coast: Alabama Extension has reported infestations in central Alabama. Do not rule out a species from the town name alone.

What does an indoor swarm tell you?

Large numbers of swarmers indoors, especially insects emerging from the building itself, call for an inspection. A few insects attracted through an opening can have a different explanation. Mississippi State Extension explains that Formosan swarmers can enter through doors or cracks without establishing that the house is infested.

Note whether you saw insects coming from a wall or simply gathering around a light. Photograph the location before cleaning up, and retain a few specimens if possible. The inspection should evaluate the evidence and accessible areas; a pile of wings does not measure the extent or age of concealed damage.

Which other signs should you report?

• Mud tubes on the foundation or other accessible surfaces.
• Damaged or hollow-looking wood.
• Discarded wings and the locations where they accumulated.
• Leaks, persistent damp areas or wood resting against the structure.

Similar-looking damage can have other causes. Our termite-damage guide can help you prepare observations, but the cause and extent still require assessment.

What should happen after the inspection?

Ask what was inspected, which areas could not be accessed and whether the findings support treatment. If a proposal is appropriate, review the method, covered structure, inspection schedule and agreement terms. A treatment record from construction does not by itself establish current protection; check renewals and service history with the provider.

EnviroCare offers Sentricon® termite baiting, with a plan and quote based on the property. Our baiting and liquid-treatment comparison explains questions to ask. Qualifying properties may receive up to $1,000,000 in termite damage repair coverage provided by EnviroCare, subject to the terms of the agreement.

Eastern subterranean vs Formosan termite swarmers in Alabama

The two termite species that swarm most around Alabama homes swarm at different times. Eastern subterranean termites, the most common subterranean termite in the state, swarm during the day from about late February into May or June, often on a warm day after rain. Formosan subterranean termites, found mainly in Mobile and Baldwin counties with scattered reports elsewhere in the state, swarm at night and are drawn to lights. A mature termite colony produces swarmers once it is large enough; the winged reproductives, a king and queen in the making, leave to start a new colony, shed their wings and look for soil in contact with wood.

Inside termite colonies: workers, soldiers and the swarmer caste

A subterranean colony is divided into castes. Worker termites do the feeding and tunneling, and they are the ones causing damage to homes, moving from the soil to a food source in wood through mud tubes. Soldier termites defend the colony. The reproductives, a king and queen, produce the eggs. Only a mature colony produces winged reproductives, and each swarmer has two pairs of wings of nearly equal length. After a short flight, swarmers shed their wings, pair off and try to start a new colony in moist soil; most do not survive.

Warm days after rain, with high humidity, are the usual trigger. The timing for each termite species in Alabama is covered above.

Reducing the conditions that let termites infest a house

Swarm season is a good time for every homeowner to check the conditions that let Alabama termites reach the wood:

• Wood in contact with the ground, such as fence posts, deck supports and siding that runs into the soil.
• Firewood and lumber stacked against the foundation.
• Cracks in concrete slabs, porches and expansion joints, which give termites a hidden path inside.
• Leaks, overflowing gutters and downspouts that keep soil wet beside the house.

A winged insect alone does not tell you which type of termite, or even whether it is a termite rather than a flying ant. An inspection does, and it is the starting point for any termite treatment plan. See termite control for how we handle signs of termite activity once they are confirmed.

Termite swarmers vs flying ants

Termite swarmers have straight antennae, a thick waist and two pairs of wings of equal length. Flying ants have elbowed antennae, a pinched waist and front wings longer than the back pair. If you find piles of identical shed wings on a windowsill, they are almost always from termite swarmers. Save a few insects in a sealed bag so the inspector can confirm the termite species.

A termite swarm inside your home is one of the clearest signs of a termite infestation, because indoor swarmers usually come from a colony feeding in or beneath the structure. Along with swarmers, report mud tubes on the foundation, wood that sounds hollow and damage near baseboards. Professional termite control starts with an inspection to find where the termite activity is and what treatment plan fits the home.

Should you wait for another swarm?

Report suspicious evidence when you find it. A quiet period does not establish that a building is free of termites, and an outdoor swarm alone does not identify damage to the house. Keep the agreed inspection schedule and discuss any new evidence with the provider.

Request a termite assessment or contact your local office: Birmingham (205) 991-2882, Alabaster (205) 940-6360, Alexander City / Lake Martin (256) 234-6162, or Huntsville (256) 937-7676. Real-estate WDO reports are a separate service with their own scope and fee.

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