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Termite Swarm Season in Fresno: What Every Homeowner Needs to Know

May 20, 20255 min read

Spring in the Central Valley is one of the most beautiful times of the year. The blossoms are in full bloom; the days are warming up, and everything feels fresh and alive. But with all this renewal comes an unwelcome guest: termite swarms. For homeowners in Fresno and surrounding areas, those tiny winged insects fluttering near your windows or doors could be more than just a seasonal nuisance—they might be the first sign of a serious, costly infestation.

At Valley Wide Pest Control, we’ve seen firsthand how quickly a small termite problem can escalate into thousands of dollars in structural damage. That's why it's so important to understand what termite swarms mean, how to spot them, and what to do if you encounter one on your property.

What Is a Termite Swarm?

A termite swarm is a natural part of the reproductive cycle for termites. During this phase, winged termites, known as alates, emerge from their existing colonies to mate and start new ones. You’ll often see them flying around light sources, especially after rain. These swarmers don’t live long, and they don’t cause damage themselves—but they’re a loud and clear sign that there is a mature termite colony nearby.

In Fresno’s mild Mediterranean climate, subterranean termites are the primary culprits. These pests live underground and enter homes through foundation cracks or gaps in wood structures, often completely hidden from view. A swarm could mean they’ve already established themselves inside your walls or crawl space.

Why Do Termites Swarm in Spring (Especially in Fresno)?

Termite swarms are triggered by a combination of temperature, humidity, and barometric pressure changes. Spring offers the perfect combination of all three. In Fresno, we usually see increased swarming activity between late March and June, especially after the first warm rain of the season.

Because much of the Central Valley has clay-heavy soil and irrigation systems that keep moisture, your home may be even more attractive to termites. Even over-watering your lawn or garden beds can unintentionally create ideal conditions for a termite colony to thrive near your home’s foundation.

How to Identify a Termite Swarm

It’s easy to mistake termite swarmers for flying ants. Here’s how you can tell them apart:

  • Wings: Termites have two pairs of wings that are equal in size and shape. Ants have larger front wings and smaller back wings.

  • Waist: Termites have a straight, uniform body. Ants have a narrow, pinched waist.

  • Antennae: Termites’ antennae are straight and beaded, while ants have elbowed antennae.

You may spot termite swarmers inside your home around window sills, door frames, vents, or light fixtures. Outdoors, they may gather near tree stumps, wooden fences, decks, or mulch beds. One of the most telling signs is a pile of discarded wings, often left behind near windows or on your floor—proof that swarmers have already mated and moved on.

What a Swarm Could Mean for Your Home

A termite swarm is a warning shot—one that shouldn't be ignored. Here's what their presence might indicate:

  • Swarm inside your home: Likely means there’s an active termite colony within your walls, attic, or crawlspace.

  • Swarm just outside: May indicate termites are nesting nearby—in a fence, tree stump, or mulch—but they could migrate into your home if conditions are right.

At Valley Wide Pest Control, we perform detailed inspections using moisture meters, thermal imaging, and years of local experience to locate colonies and assess any damage. We know exactly where to look in Fresno homes, including foundation slabs, basement joints, rooflines, and older wood-framed structures.

What to Do If You Spot a Swarm

If you see termite swarmers, here’s what you should do immediately:

  1. Don’t panic, but don’t ignore them. Time is critical.

  2. Take pictures or a video to document the size and location of the swarm.

  3. Collect a specimen if possible—this helps with species identification.

  4. Avoid spraying or disturbing them. Over-the-counter sprays won’t eliminate the colony and can drive termites deeper into your structure.

  5. Call Valley Wide Pest Control for a professional termite inspection and action plan.

 How to Prevent Termite Infestations in Fresno Homes

Prevention is your best defense against termites. Some practical, Fresno-specific tips include:

  • Reduce moisture: Fix leaky outdoor faucets, irrigation leaks, and plumbing problems.

  • Trim trees and shrubs: Overhanging branches and dense vegetation near your foundation create shade and keep moisture.

  • Use proper mulch: Keep mulch at least 12–18 inches from the foundation and limit depth to 2–3 inches.

  • Store firewood properly: Never stack it directly against the house or on the ground.

  • Inspect annually: Valley Wide Pest Control offers affordable annual inspections that identify early warning signs before major damage occurs.

Termite Treatment Options from Valley Wide Pest Control

If termites are discovered, don’t worry—we offer a range of safe, effective, and locally trusted treatments, including:

  • Soil Treatments: We apply advanced liquid termiticides that create a protective barrier around your home’s perimeter.

  • Baiting Systems: Installed discreetly in the ground, these baits attract and eliminate entire colonies.

  • Wood Treatments: Directly applied to problem areas for localized infestations.

  • Pre-Construction Treatments: Ideal for builders and renovators to protect homes before termites have a chance.

All treatments are pet- and family-safe, and we back our services with comprehensive warranties and long-term monitoring.

Why Fresno Homeowners Trust Valley Wide Pest Control?

We’re not a franchise. We’re your neighbors. Our team has deep roots in the Central Valley and over two decades of experience protecting homes just like yours. We understand the soil types, weather, and building practices that affect termite behavior in our area.

When you choose Valley Wide, you get:

✅ Same-day inspections and service
✅ Transparent pricing with no hidden fees
✅ Customized treatment plans for your home’s needs
✅ Licensed, friendly local technicians who truly care

Final Thoughts: Don’t Let Termites Take Over Your Home

Termite swarm season in Fresno is more than just a seasonal nuisance—it’s a sign that your home could be at risk. The good news? You don’t have to face it alone.

Whether you’ve already seen swarmers or just want peace of mind, Valley Wide Pest Control is here to help. We’ll inspect your home, explain your options, and create a personalized plan to keep termites out—for good.


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Valley Wide Pest Control

Valley Wide Pest Control. the leading pest control experts in Central Valley, CA with over 40 years of unparalleled service. Say goodbye to pests with Valley Wide Pest Control!

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