Mosquitoes

All About Mosquitoes

Mosquito season is the season that ruins backyards. Across Illinois, Iowa, Wisconsin, and Michigan, the late April thaw kicks off six months of biting pressure that follows our families from the dinner table to the deck to the kids’ soccer practice. Mosquitoes also carry real disease risk in the upper Midwest: West Nile virus shows up every summer, and La Crosse encephalitis sits in the woodland corners of Wisconsin and northern Illinois. We’ve helped families across the region take their yards back for over 20 years, and the answer is rarely a single can of bug spray. It’s a layered approach built around how mosquitoes actually breed and feed.

What are Mosquitoes?

Mosquitoes are small, flying insects in the family Culicidae. Females need a blood meal to produce eggs, which is why only female mosquitoes bite. Males feed on plant nectar and don’t bother people. Across our service area, three groups of mosquitoes drive almost every call: Culex species (the main West Nile virus carriers in the Midwest), Aedes species (including the aggressive daytime-biting Asian tiger and floodwater Aedes vexans), and Anopheles species (mostly nuisance biters in the upper Midwest). Different species, different timing, similar prevention approach.

How to Identify Mosquitoes

Appearance: Adult mosquitoes have a slender body, long thin legs, narrow wings, and a long piercing mouthpart called a proboscis. They typically run two to ten millimeters long. Color varies by species. Culex mosquitoes look brownish gray. Aedes albopictus (the Asian tiger) has bold black and white stripes on the legs and body, which is the easiest field ID across our region. Aedes vexans, a common floodwater species in the Midwest, looks brown with banded legs.

Lifecycle: Mosquitoes go through four stages: egg, larva, pupa, and adult. Eggs are laid on or near standing water. Larvae and pupae live in the water (you may have seen “wrigglers” in a bird bath). Adults emerge and start the cycle over. In warm summer weather, the full lifecycle can finish in seven to fourteen days, which is why a single ignored container of standing water can produce wave after wave of biters.

Similar Pests: Mosquitoes are sometimes confused with crane flies (the long-legged “skeeter eaters” that don’t bite at all) and midges (small swarming flies near water that also don’t bite). The piercing proboscis is the giveaway. If it has a long needle-like mouthpart, it’s a mosquito.

Activity and Seasonality

Active Seasons: Mosquito activity in IL, IA, WI, and MI typically runs from late April or early May through the first hard freeze, usually mid to late October. Peak biting pressure hits between late June and early September. Aedes mosquitoes are most active at dawn, dusk, and during the day in shaded areas. Culex mosquitoes (the West Nile carriers) are most active from dusk through dawn. Asian tiger mosquitoes will bite anytime they can find a host, including the middle of the afternoon.

Where Activity Peaks: Some areas of our service region carry extra mosquito pressure. The Mississippi River corridor through the Quad Cities and into Clinton, Iowa runs heavy after spring floods. The Rock River, Fox River, and Grand River corridors push pressure into Rockford, the Fox Valley, and Grand Rapids. Lake Geneva and Wisconsin Dells see vacation-rental complaints every summer. Suburban subdivisions with retention ponds, woodland edges, or storm drains that hold water concentrate Culex populations. After heavy rains, expect a two-week surge as floodwater Aedes mosquitoes hatch in waves.

Where to Find Mosquitoes in or Around Your House

Mosquitoes need standing water to breed, and “standing” can mean less than a tablespoon. Look around the property for:

Clogged gutters and downspouts.
Bird baths, dog bowls, and planter saucers.
Old tires, kiddie pools, wheelbarrows, and tarps that hold rain water.
Buckets, recycling bins, and trash can lids.
Tree holes and tree-cavity puddles.
Drainage ditches, low spots in the lawn, and stagnant retention areas.
Boats, canoes, and kayaks stored uncovered.
Compost piles that stay too wet.

Adult mosquitoes rest during the day in cool, shaded vegetation. Check dense shrubs, ground cover, the underside of decks, garage corners, and along the foundation where overgrown plantings touch the house.

How to Get Rid of Mosquitoes

Immediate Action: Three steps that help right away:

Walk the property and dump every container holding water, then turn them upside down or store them under cover.
Clean clogged gutters and check that downspout extensions actually drain away from the house.
Wear long sleeves at dusk and use an EPA-registered repellent (DEET, picaridin, or oil of lemon eucalyptus) when you’re outdoors during peak biting hours.

Professional Treatments: For households serious about mosquito reduction across the active season, PCC offers a Mosquito and Tick Hybrid Service as an add-on to the Pest Protection Club. It’s an environmentally friendly barrier treatment built around how mosquitoes and ticks actually live in a yard, with visits at three-week intervals through the active season. Each visit includes:

A property inspection to find and eliminate standing water and other breeding sources.
Larvicide treatment for any water sources that can’t be removed, which prevents larvae from maturing.
A targeted fog of adult mosquito and tick resting sites, including perimeter vegetation and shaded areas under decks.

We also offer a one-time Mosquito/Tick Event Treatment for short-term protection around outdoor parties, reunions, and graduation gatherings. Both options come with PCC’s 100% guarantee.

DIY Methods: A few homeowner steps genuinely help. Citronella candles and tiki torches reduce biting in a small area immediately around them, but they don’t clear a yard. Bug zappers kill mostly harmless insects and few mosquitoes. Mosquito-proofing window and door screens makes a real difference indoors. Adding fans to outdoor seating areas helps because mosquitoes are weak fliers and wind disrupts them. DIY tends to fall short when the property has structural breeding sources you can’t remove (drainage issues, retention ponds, neighboring tall grass) or when the family wants reliable coverage through July, August, and September.

How to Prevent Mosquitoes

A practical prevention checklist for households across our service area:

Walk the property every Saturday during the active season and dump any standing water you find.
Keep gutters cleaned and confirm downspouts drain at least three feet from the foundation.
Stock ornamental ponds with mosquito fish or use mosquito dunks in features you can’t drain.
Empty and refill bird baths and pet water bowls every few days.
Store boats, canoes, kayaks, and wheelbarrows upside down or under cover.
Keep grass mowed and trim back shrubs and ground cover where adult mosquitoes rest.
Repair or replace torn window and door screens.
Run an outdoor fan near patios and seating areas at dusk.
Wear long sleeves and EPA-registered repellent when you’re outside at dawn or dusk.
Add the Mosquito and Tick Hybrid Service to your Pest Protection Club for three-week barrier treatments through the active season.

Conclusion

Mosquitoes are the pest that makes families give up on their backyards in July. They don’t have to be. The combination of weekly source removal, a three-week barrier treatment built for the way mosquitoes actually live, and good personal protection at dusk can take a high-pressure yard down to a usable one within a couple of visits. If your kids are getting eaten alive on the patio or you have an outdoor event coming up, our Mosquito and Tick Hybrid Service is the most direct way to get pressure under control across spring, summer, and fall.

Ready to take your yard back? Schedule your service or call us at (815) 284-4101.