Colorado is home to scorpions. While these arachnids do reside in the state, they are generally not considered a major threat to humans. The species found in Colorado typically deliver stings that are comparable to a bee or wasp sting.
Scorpion Presence in Colorado
Scorpions in Colorado are primarily found in the warmer, more arid regions of the state. Southeastern Colorado is a common area for them. They also inhabit the western slope, particularly in areas near the Utah border and locations like Dinosaur National Monument. These environments, characterized by rocky terrain, lower elevations, and often sparse vegetation, provide ideal conditions for scorpions to thrive.
During the day, scorpions typically seek shelter in cool, dark places to avoid the heat. They can be found under loose rocks, dead wood, dried cattle manure, and within crevices. Areas near stream beds and riverways can also support higher scorpion populations due to available moisture and prey. These nocturnal predators emerge at night to hunt, utilizing their unique ability to glow under ultraviolet light.
Common Colorado Scorpion Species
Three species of scorpions are found in Colorado: the common striped bark scorpion (Centruroides vittatus), the northern desert hairy scorpion (Hadrurus spadix), and the northern scorpion (Paruroctonus boreus). The common striped bark scorpion is widespread in southeastern Colorado and can grow up to 2.75 inches long, characterized by two dark stripes along its back. Its venom causes symptoms similar to a bee sting, including pain, tingling, and numbness at the site, which subsides within 24 hours.
The northern desert hairy scorpion is the largest species in Colorado, reaching up to five inches. It is mainly found on the western slope, including areas like Dinosaur National Monument. Despite its size, its sting generally results in a sharp burning sensation for a few hours. The northern scorpion, measuring between 1.5 to 2.0 inches, is pale yellow to orange-brown with a dusky back. Its venom has low toxicity, and stings cause mild reactions, often described as similar to a hornet sting, with localized numbness that may last several hours.
Encountering Scorpions in Colorado
Scorpions can find their way into homes, seeking shelter from outdoor elements or following prey. They may enter through small gaps under doors, windows, or cracks in foundations and walls. To prevent scorpions from entering homes, it is advisable to seal cracks and crevices in the exterior, ensure window screens are intact, and replace damaged weather stripping around doors and windows. Removing potential hiding spots around the home, such as woodpiles, loose rocks, and debris, can also reduce their presence.
If a sting occurs, symptoms are typically localized pain, tingling, and numbness. A cold pack applied to the area for about 20 minutes can help reduce pain and swelling. Over-the-counter pain relievers like acetaminophen or ibuprofen can also be used to manage discomfort. Seeking medical attention is recommended if symptoms are severe, involve widespread numbness, or if the stung individual is a young child or has an allergic reaction.