Pest Library


Welcome to our Pest Library, your comprehensive resource for understanding, identifying, and managing the pests you may encounter in Larimer County, Colorado. This library is more than just a collection of pest profiles; it’s a dynamic repository of knowledge, insights, and professional advice.


Whether you’re dealing with pests in a residential or commercial property, our Pest Library is here to help. Here, you’ll find detailed descriptions of different pests and rodents common to our area, along with a series of articles that delve deeper into pest management topics.


From understanding the habits of various pests and recognizing signs of infestation, to learning effective strategies for prevention and control, the Pest Library is your guide to pest management in Larimer County.

Discover more about these critters and how John’s Pest Control can assist in keeping them at bay. Dive into our articles, enrich your knowledge, and equip yourself with the information you need to maintain a pest-free environment.


Spiders in Larimer County

Despite controlling other pests, spiders’ unique appearance and venomous bites can be unsettling. Some species pose health risks, making professional pest control essential.


Despite their ecological importance, bees can become a nuisance with their hives, especially if a member of your household is allergic. Their sting is painful but usually harmless.

Gnats/Fruit Flies

Gnats and fruit flies are tiny, pesky insects that buzz around ripe fruits and stagnant water. Known for their rapid reproduction rates, they can overrun your home if not controlled promptly.


Cricket Control in Larimer County

While crickets are generally harmless, their incessant chirping can be disruptive. These insects, when indoors, can damage fabric, paper, and food.


Feared for their survival skills, roaches contaminate food and spread diseases. These 1-3 inch pests thrive in warm, dark places, potentially making your home their haven.


Wasps, known for their painful sting, are attracted to human food and garbage. Their aggressive defense of nests poses a significant concern for homeowners.


Slow-moving millipedes are harmless detritivores often found in damp areas. While they don’t pose a threat to humans or pets, their appearance can be off-putting.


Featuring pincers on their abdomen, earwigs are nocturnal creatures that feed on a wide range of materials. Though harmless, their presence in homes is usually unwelcome.


Seasonal Pest Activity

Rodents, including rats and mice, spread diseases, contaminate food, and damage property. Their rapid breeding emphasizes the importance of prompt infestation control.

Boxelder Bugs

Boxelder Bug Control

Boxelder bugs, with distinctive black and red markings, infest homes in large numbers, seeking warmth. While not dangerous, their sheer numbers can be overwhelming.


Ants are social insects recognized by their segmented body structure. They can be a nuisance in homes and businesses, invading in large numbers and contaminating food sources. 


Ticks in Larimer County

Ticks, external parasites, feed on the blood of humans and pets, transmitting diseases like Lyme disease. They thrive in wooded or grassy areas and are most active in warmer months.