Types of Cockroaches in Colorado: What You Need to Know
Think you’re in the clear from cockroaches in Colorado? You might want to think again. If you live in Denver, Boulder, Colorado Springs, or Northern Colorado, these resourceful pests can easily find their way into your home. From the tiny, fast-moving German cockroach to the larger, slower American cockroach, each species has its behavior and habits that could make them difficult to manage. Whether you're simply curious or worried after spotting one of these unwelcome visitors, understanding the most common types of cockroaches in Colorado can help you prevent an infestation before it takes hold.
Identifying Cockroaches: A Quick Guide
Colorado's three most common types of roaches share a few physical traits. First, all have long antennae, six legs with spines, two small appendages at the end of the abdomen (called cerci), and three body parts. Some cockroaches have wings, while others don't.
Now that you know what cockroaches have in common, let’s dive into the details of the most common types you'll encounter in Colorado. Each species has its quirks—knowing what to look for can help you act quickly if one of these pests starts causing problems in your home.

American Cockroaches
American cockroaches are the biggest of the house-infesting pests you'll find in Colorado. With their reddish-brown bodies and the distinct yellowish figure-eight pattern on their heads, they're hard to miss.
While these roaches have wings and can fly short distances, they prefer to scurry around, especially in warm, moist areas like basements and kitchens. Their presence often signals a potential problem that needs attention before it grows.

German Cockroaches
German cockroaches are the most common and troublesome roach species in homes across Colorado. Smaller than their American counterparts, these roaches are light brown or tan with two black lines running down their backs.
They’re known for being quick and elusive, and their ability to reproduce rapidly makes them one of the most challenging pests to deal with. If you've seen one scurrying around, it's a good idea to address it sooner rather than later.

Oriental Cockroaches
Oriental cockroaches are less agile than American and German cockroaches, but they still pose a problem. These shiny, dark brown to black roaches are typically found in cooler, damp areas such as crawl spaces, drains, and basements.
While they might not be as fast-moving, their preference for these hidden spots can make them harder to eliminate.
Now that you have learned about each of the common cockroaches in our area let's discuss what it means to find one in your home.
Does One Cockroach Mean You’re Infested?
While spotting a single cockroach doesn’t automatically mean your home is infested, it should raise a red flag. Cockroaches are persistent pests that can quickly establish a foothold in your home if left unchecked. They can sneak in through tiny cracks and crevices and often hide in hard-to-reach places during the day, making them difficult to spot. A single cockroach is usually a sign that there are others nearby, especially if it’s an adult carrying an ootheca (egg casing). These casings contain dozens of eggs that can hatch within weeks, leading to an even larger infestation.
Cockroaches are excellent at surviving in human environments because they can feed on a variety of things, from food scraps to non-food items like paper or glue. This adaptability means that even if you’ve cleaned up, they can still find something to sustain them. Additionally, they tend to reproduce rapidly, with some species capable of laying multiple egg cases in their lifetime. So, while one cockroach might seem like a small issue, it could be the beginning of something bigger if you don’t act fast.
If you spot one cockroach, it’s wise to contact a pest control company for an inspection. A professional can assess the situation, locate any potential hiding spots, and help prevent a full-blown infestation before it takes hold.
Don't Let Roaches Take Over - Act Now!
Spotted a cockroach in your home? It could be more than just a random visitor—it might be the start of an infestation. While one cockroach doesn’t always signal a full-blown problem, taking action before more show up is a good idea. Cockroaches can spread germs, trigger allergies, and be tough to get rid of on your own. The sooner you address the issue, the easier it is to prevent a bigger headache down the line.
If you’ve spotted a cockroach (or several), don’t wait for the situation to escalate. EnviroPest offers thorough inspections, effective treatments, and preventive strategies to tackle cockroaches head-on. We’ve got the tools and expertise to handle whatever pests come your way, so contact us today and let us help keep your home pest-free.

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Our Colorado's Choice Smart Service is the most comprehensive home pest control plan EnviroPest targets 30+ pests and includes four seasonal visits and 24/7 digital rodent monitoring.
Pests covered under the Colorado's Choice Smart Service includes:
- Ants (Carpenter ants, odorous house ants, pavement ants, sugar ants)
- Beetles
- Centipedes
- Earwigs
- Mice
- Rats
- Spiders (House spiders, rock spiders, wolf spiders, black widow spiders)
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