Southlake Pest Season Guide: A North Texas Calendar

This Southlake pest season guide works like a weather calendar: North Texas pests follow rain, heat, and the first cold fronts more than the date on the wall. Spring storms set off termite swarms and fire ant mounds, the long summer drives mosquitoes and scorpions, and fall pushes rats and mice toward attics. The pattern is the same from the Lake Grapevine shoreline to Westlake and Trophy Club. When something on this calendar moves past the do-it-yourself stage, call (817) 873-3765 and get connected with an independent local pest pro who is seeing the same thing across Tarrant County.

Late Winter to Spring: Termite Swarm Season in North Texas

Texas A&M AgriLife's urban entomology program notes that termite swarming starts as early as January and February in South Texas and as late as April and May in the Panhandle. North Texas falls between the two, so in Southlake most homeowners see swarms in spring, commonly March and April. Heat, light, and moisture trigger the flights, which is why a warm, humid day after rain is when swarmers tend to pour out of the ground or out of a wall.

What to watch for:

• Swarmers indoors, often near windows, sliding doors, or light fixtures, or piles of shed wings on a sill.
• Mud tubes on the foundation, slab edge, or around plumbing and utility penetrations. AgriLife lists these shelter tubes as a sign of infestation.
• Soft or blistered trim near the ground, especially where mulch or soil is piled against stone veneer.

Swarmers inside the house are not something to wait on. The Southlake termite control page explains what to ask a pro about treatment options.

Spring and Fall: Fire Ants After Rain

Fire ant mounds seem to appear overnight after a storm, and Texas A&M AgriLife entomologists explain why: rain doesn't create more fire ants, but saturated soil collapses their tunnels and colonies rebuild higher, pushing fresh soil into mounds. Southlake's clay-heavy soils hold water, so lawns that looked clean in a dry stretch can sprout a dozen mounds after a spring or fall front moves through.

AgriLife's recommended rhythm is a fall broadcast of granular bait followed by spot treatment of mounds that come back in spring. Odorous house ants have their own rain pattern: they tend to move indoors during and after heavy rain. For both, the ant control Southlake page covers what to tell a pro.

April Through November: Mosquito Season in DFW

Tarrant County Public Health treats mosquito season as April through November, with West Nile virus activity typically rising from May through October as the weather warms. The county runs mosquito surveillance traps across its cities, and Southlake's large lots add their own breeding spots: birdbaths, pool covers, clogged gutters, French drains, decorative pots, and the saucer under every planter.

The first fix is yours and takes ten minutes after each rain: tip out standing water and clear gutters. If the yard still isn't usable at dusk, many homeowners add a recurring mosquito treatment through the warm months. Ask a pro what areas get treated and how often.

Summer Heat: Scorpions in Southlake, TX

The striped bark scorpion is the most widespread scorpion in Texas, and AgriLife notes it is the species most likely to come indoors. It is yellowish tan with two dark stripes down its back. Activity peaks in the hottest, driest weeks of July and August, when scorpions go looking for moisture, and they are good climbers, so many sightings in homes are tied to attics. Stings are painful and cause swelling that can last a few days.

They shelter by day under landscape rock, firewood stacks, loose stone edging, and debris, then hunt at night. Moving woodpiles off the house, sealing gaps under doors and around plumbing, and reducing clutter in the garage all help. If you're finding them indoors repeatedly, a perimeter treatment plus sealing work is a common next step.

Fall and Winter: When Mice and Rats Come Inside

Rodent calls in the Dallas-Fort Worth area climb as fall turns cool and wet, because outdoor food gets scarce and attics are warm. Roof rats use tree limbs, fences, and utility lines to reach rooflines; mice slip in low through garage door corners and gaps around pipes. The tell is usually noise in the ceiling at night or droppings found while pulling holiday decorations out of attic storage.

Fall is also a smart time to walk the house: trim limbs back from the roof, check vent screens, and close gaps around AC lines and dryer vents. The rodent control Southlake page explains trapping and exclusion.

Year-Round: Roaches, Spiders and Everything Else

Roaches, spiders, and ants don't disappear in winter in North Texas; they just move closer to the house. That's why many Southlake homeowners keep a recurring plan instead of reacting season by season. One thing this line doesn't cover is wildlife, such as animals nesting under decks or in chimneys; ask a wildlife specialist about those.

When to Call

Call when the problem is inside the house, coming back after you've treated it yourself, or tied to structure, as termites and rodents are. This is a free call-connection service, and the pros who answer are independent local businesses; ask for their Texas Department of Agriculture structural pest control license number and proof of insurance before you hire. The Southlake pest control homepage lists everything they handle.

Seeing something from this calendar right now? Call (817) 873-3765 and describe it.