Your guide to local pests in Ontario, California
Understanding the pests common to Ontario, California, is the first step in effective pest control. Here, you will find comprehensive information on the most frequent invaders, helping you identify potential threats and protect your home or business.

Ants, spiders, and mosquitoes: The everyday invaders
In Ontario, California, ants, spiders, and mosquitoes are among the most common household pests. Ants often enter through tiny cracks looking for food, while spiders seek shelter in undisturbed areas. Mosquitoes, on the other hand, are drawn to standing water for breeding. Recognizing these patterns is crucial for prevention.

Yellow jacket wasps, fleas, and beetles: Persistent problems
Yellowjacket wasps can be aggressive and build nests in unexpected places, posing a stinging hazard. Fleas are often introduced by pets and can quickly infest carpets and upholstery. Various types of beetles, from carpet beetles to ground beetles, can thrive both indoors and outdoors, seeking food and shelter. Early identification is key to managing these pests.

Common entry points and why pests are a problem
Pests commonly enter homes through structural gaps like cracks, openings around doors and windows, damaged screens, and utility openings for HVAC and plumbing. Weather events can also push pests indoors. These invaders are more than just a nuisance; they can cause health hazards (allergens, pathogens, bites), property damage (wood rot, insulation loss), and financial costs. Look for signs like droppings, chewed wires, or nests to catch problems early.
The Most Common Rodents in California and How to Control Them
If you live in California, odds are you have already crossed paths with a house mouse, the most common rodent in the state. But mice are just the opening act. Rats and squirrels turn up in homes and businesses from the coast to the Central Valley, and each one brings its own headaches. Dewey has spent decades dealing with all of them, and we would rather you spot the signs early than learn the hard way. In this blog, we break down the common rodents in California you are most likely to meet, how to tell them apart, and what it takes to get to a rodent-free home.
Unique insights for effective pest control
Many customers don’t realize that pests like termites, carpenter ants, or raccoons are drawn to specific conditions—moisture, food sources, or shelter. Understanding these attractants is crucial for effective prevention. For example, addressing leaky pipes can deter termites, while securing outdoor food sources can prevent rodent infestations. Our expertise helps you tackle the root cause, not just the symptoms.