What Are the Most Common Pests in the Spring in Fairmount?
Posted by Mosquito Squad Plus
May 21, 2026
Spring in Fairmount doesn’t arrive in silence, at least as far as the pests are concerned. One week, you’re still scraping frost off windshields, and the next week the pests are back. And sometimes they’re all there at once. Blame the climate of the Denver Front Range if you must. It seems like we can go from winter to warm in about sixty seconds.
You don’t have to simply put up with pests, though. There are plenty of things that Fairmount homeowners can do to make life a little more comfortable. But it helps to know what the most common pests in the spring are in Fairmount before taking action.
Mosquitoes
Mosquitoes show up earlier than most people expect in the Denver area. Once temperatures consistently hit the 50s and spring rain or snowmelt creates standing water, the first breeding cycle begins. Fairmount has a lot of irrigated lawns and mature landscaping, and that adds artificial breeding sites that stay active even during the dry stretches.
The population compounds quickly from there. By early summer, what started as a few mosquitoes in April becomes a full-blown problem. Getting ahead of it with a barrier treatment in spring means you're treating a small population rather than chasing a large one.
Wasps and Hornets
Spring is when queen wasps come out of overwintering and start building new nests. In Fairmount, check eaves, soffits, fence lines, pergolas, and ground-level areas. If you happen to find a wasp or hornet's nest early, such as in March or April, you stand a good chance of being able to safely remove it on your own. But by the time it’s a basketball-sized nest in July, you probably can’t. If that happens, you’ll want to call a professional because established wasp and hornet colonies are notoriously difficult to get rid of.
Ants
Ants become active as soon as the soil warms, and in Fairmount's established neighborhoods, they're one of the first pests homeowners notice indoors. They follow moisture paths along foundations and through gaps around doors and windows.
Carpenter ants are especially problematic. As their name suggests, they can saw through wood framing with their mandibles because they like to carve out places to nest within it. These ants can do serious damage to your home if left unchecked, and they’re present in Colorado, often finding comfort in homes with moisture issues.
Seal entry points early in the season if you are concerned about ants. This includes door sweeps, window frames, and gaps around utility lines. If you have moisture problems inside, it’s a good time to address them.
Spiders
Spiders follow the insects. As mosquitoes, ants, and flies become active in spring, spiders show up next because they feed on insects. That’s why you can often find spiders around exterior lighting, in garage corners, along eaves, and in undisturbed areas of basements.
Black widows are present in the Denver area and tend to favor sheltered, ground-level spots like window wells, storage areas, and the underside of outdoor furniture. Most spiders aren't dangerous, but nobody enjoys walking face-first into a web on the way to the grill.
Ticks
Ticks are expanding their range in Colorado, and the wooded edges and open spaces near Fairmount provide habitat. Rocky Mountain spotted fever is the primary health concern.
If you spend time outdoors gardening, hiking, or even walking the dog near a greenbelt, it’s worth doing tick checks afterward. This is especially true for kids and pets who tend to spend more time in the grass and brush where ticks wait.
Need Pest Control in Fairmount, CO?
Every pest on this list is easier to manage in early spring, when populations are small and colonies are just establishing, than in mid-summer when they've had months to build. Waiting means playing catch-up later.
A comprehensive pest control plan from Mosquito Squad of West Denver addresses mosquitoes, wasps, ants, spiders, and ticks in a single service. That way, you won’t need to react to each one individually as they arrive.
Looking for Fairmount pest control you can trust this spring? Call Mosquito Squad of West Denver at (303) 997-0166 or contact us online for a free quote.
