Are There Centipedes in Wyoming?

Are They in Wyoming?

Centipedes are found in Wyoming but are limited to areas with adequate moisture. The state's generally arid climate prevents centipedes from being as abundant as in wetter regions. Centipedes are most common in the mountainous regions, including the Rocky Mountains, the Bighorn Range, the Wind River Range, and surrounding foothills. Areas near the North Platte River, South Platte River, and other stream corridors support centipede populations. Western Wyoming, particularly in Teton County near Jackson Hole and Grand Teton National Park, has healthy centipede populations in moist forest habitats. Centipedes can be found in the Laramie Range and Medicine Bow Mountains. Eastern Wyoming and the High Plains regions east of the mountains are too dry to support significant centipede populations. Small soil-dwelling centipedes are far more common than house centipedes in Wyoming. House centipedes are rare indoors but can be found in homes in wetter areas or those with particularly damp basements. Wyoming has no large or dangerous native centipede species. For detailed information aboutCentipede in Wyoming, consult local hiking and naturalist guides.

How Dangerous Is It?

Centipedes in Wyoming pose virtually no threat to humans. All native centipede species in Wyoming are either small and incapable of biting or completely harmless. The few larger centipede species that might occur in southern Wyoming are not aggressive and would never bite unless violently threatened. A centipede bite would be extremely unlikely and would be minor if it occurred, similar to a mosquito bite. The venom in Wyoming centipedes is weak and causes only mild, localized pain in the rare event of a bite. No deaths from centipede bites have been recorded in Wyoming or anywhere in the northern United States. Wyoming's dry climate prevents the presence of medically significant centipede species. Centipedes have no interest in humans and will always flee when disturbed. Most people who spend their entire lives in Wyoming will never encounter a centipede, let alone experience a bite. Centipedes are beneficial animals that help control pest insects and spiders. Fear of centipedes in Wyoming is unnecessary.

How to Recognize One

Wyoming centipedes are generally small compared to species in warmer, wetter regions. Small soil-dwelling centipedes are typically under 2 inches long and are brown or pale in color. They have a segmented body with one pair of legs per segment. Rare house centipedes that reach Wyoming homes have very long, thin legs and a flattened body that is usually yellowish or light brown. House centipedes move quickly and unpredictably. All centipedes have exactly one pair of legs per body segment, distinguishing them from millipedes, which have two pairs per segment. Centipedes have small curved fangs on their head used to inject venom into insects and spiders. These fangs are far too small to harm human skin. In Wyoming, you'll find centipedes in damp places: under logs and bark near streams, in leaf litter in mountain forests, in moist soil, and around water sources. Look for them in areas along the North Platte River, in Grand Teton National Park, and in otherWyoming wildlifehabitats with permanent moisture. Centipedes are entirely nocturnal.

What to Do If You Are Bitten or Stung

Centipede bites in Wyoming are extremely rare, but if one occurs, stay calm and stay still. Wash the bite area immediately with soap and clean water. Keep the bitten area elevated and immobilized if possible. Remove any tight rings or bracelets from the affected hand to prevent swelling. Apply a cool, clean cloth to ease any pain. Over-the-counter pain relievers can help manage discomfort, and antihistamine cream may reduce itching. Most centipede bites heal completely within hours without any special care. Seek medical attention only if you experience severe pain, excessive swelling, or signs of infection such as increasing redness or warmth around the bite. This is general information, not medical advice; if you are bitten, call Poison Control at 1-800-222-1222, or 911 if symptoms are severe. Do not cut, suck, or apply tourniquets to the bite. Simply clean the wound and monitor it for healing.

How to Prevent Encounters

Preventing centipede encounters in Wyoming starts with managing moisture since centipedes seek damp environments. Keep basements and crawl spaces well ventilated and dry. Seal cracks and gaps around foundation walls, windows, doors, pipes, and vents. Remove piles of leaves, mulch, and dead wood from close to your home's foundation. Store firewood at least 20 feet from the house and off the ground. Keep shoes and clothing off floors, and shake out shoes before wearing them, especially if stored in damp areas. When hiking in the Rocky Mountains, Grand Teton National Park, the Bighorn Range, or other Wyoming mountains, wear closed-toe shoes and long pants in tall grass or dense vegetation. After spending time outdoors in forested or riparian areas, check your clothing and skin, though centipedes rarely climb onto people. Reduce moisture around garden beds through improved drainage. Inside the home, ensure good ventilation in basements and other damp areas. Use a dehumidifier if needed. Clean gutters regularly to prevent water from pooling near the foundation. You can learn more aboutour wildlife guidesto understand Wyoming's diverse wildlife.

Where in Wyoming and When

Centipedes are found throughout Wyoming's mountainous regions and are most common in areas with adequate moisture. They are most active during spring and fall when soil moisture is highest and temperatures are moderate. The Rocky Mountains, including areas around Yellowstone National Park and Grand Teton National Park, support healthy centipede populations in forest habitats. The Bighorn Mountains and Medicine Bow Mountains in central Wyoming have centipede populations in wooded areas. Stream corridors and riparian zones along the North Platte River, South Platte River, Laramie River, and other waterways support centipedes throughout the state. Forested foothills and mountain valleys with adequate leaf litter and decaying wood are ideal centipede habitat. High elevation areas above the tree line and the dry High Plains east of the mountains have few or no centipedes. In the rare cases where centipedes are found indoors in Wyoming, they are most commonly seen during late fall and winter. Summer activity is primarily outdoors in moist forest habitats. Nocturnal behavior means centipedes are rarely encountered during daylight. To learn more about seasonal patterns inwildlife in Wyoming, consult park ranger guides and naturalist resources.

Harmless Lookalikes

Many creatures in Wyoming are mistaken for dangerous centipedes, but recognizing harmless lookalikes can ease your mind. Millipedes are the most common confusion. They have rounded bodies, move slowly, and have two pairs of legs per body segment. Millipedes are completely harmless and cannot bite. Silverfish are often confused with small centipedes but are insects with six legs and long antennae. They are harmless scavengers. Soil-dwelling insect larvae sometimes resemble small centipedes but are entirely different animals. Harvestmen, also called daddy longlegs, have extremely long thin legs and small bodies and are frequently confused with house centipedes. They are harmless spiders that feed on insects and mites. Ground beetles, which are common in Wyoming gardens and woodlands, have hard bodies and short legs and cannot be mistaken for centipedes upon close inspection. Pseudoscorpions are tiny harmless arachnids sometimes confused with centipedes. The creature you found is almost certainly a harmless soil centipede or small spider.More on Centipede in Wyomingcan help you identify it with certainty.

Frequently Asked Questions

Are centipedes deadly? No. There have never been any deaths from centipede bites in Wyoming or anywhere in North America. Wyoming has no centipede species that is medically dangerous to humans.

How common are centipede bites in Wyoming? Extremely rare. Centipedes are not aggressive and will not bite people. Most Wyoming residents will never experience a centipede bite in their entire lifetime, as centipedes are generally uncommon in the state.

What attracts centipedes to a house? Moisture and food. Centipedes are drawn to damp basements and other humid spaces where they can find insects and spiders. Reducing moisture makes homes less attractive.

What should I do if I see one? Leave it alone. Centipedes are beneficial predators that help control household pests and garden insects. If you prefer it outside, gently guide it into a cup and release it outdoors. If it's in your home, simply ignore it and it will move on or disappear into cracks and walls. Visit ourWyoming wildlife guideto learn more about sharing your state with wildlife.