Are There Tarantulas in Wyoming?
Yes, tarantulas live in Wyoming, but they are far less dangerous than their fearsome appearance suggests. These large spiders are found mainly in southern and western portions of the state. Tarantula bites are extraordinarily rare, and bites rarely cause serious medical problems. Understanding these spiders can ease concerns about Wyoming's unique wildlife.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 21, 2026.
Desert Tarantula 路 115527224325819725585 CC BY
Texas Brown Tarantula 路 Chris Stahl CC BY
Steindachner's Ebony Tarantula 路 Millie Basden CC BY
Real sighting data, source iNaturalist
Only 0 verified observations on iNaturalist of tarantula have been logged in Wyoming, which fits how rare they are in the state. That low number is itself the most honest answer to whether you are likely to see one here.
Yes, tarantulas live in Wyoming, but they are far less dangerous than their fearsome appearance suggests. These large spiders are found mainly in southern and western portions of the state. Tarantula bites are extraordinarily rare, and bites rarely cause serious medical problems. Understanding these spiders can ease concerns about Wyoming's unique wildlife.
Are They in Wyoming?
Yes, tarantulas are established in Wyoming and represent a natural part of the state's wildlife. Several Aphonopelma species occur across southern and western Wyoming, where they have lived for generations. The Bighorn Basin, areas surrounding the Bighorn Mountains, and regions near the Colorado border support populations. Tarantulas are most common in the semi-arid and arid portions of Wyoming where suitable habitat exists. They are less common or absent in the northern parts of the state and in high elevation areas where winters are severe. Despite their presence across parts of Wyoming, actual encounters remain uncommon since these spiders are shy and reclusive. They spend most of their time hidden in burrows or beneath rocks and debris. Most Wyoming residents who live in regions where tarantulas occur may never see one in the wild. For specific information abouttarantula in Wyoming, explore resources aboutWyoming wildlife. Tarantulas are a harmless and normal part of Wyoming's diverse ecosystem.
How Dangerous Is It?
Tarantulas are significantly less dangerous than their large, hairy appearance suggests to people unfamiliar with spiders. These are docile creatures that will only bite if handled roughly or if they feel completely trapped with no escape route. A tarantula bite feels similar to a bee sting and causes only minor localized pain or swelling. Healthy adults experience mild symptoms that typically resolve within hours or a day or two. Tarantula venom is weak and causes no serious systemic effects in humans. No deaths have been reported in North America from tarantula bites in modern times. People throughout Wyoming and beyond keep tarantulas as pets, demonstrating their docile nature through thousands of safe interactions annually. Serious medical complications from tarantula bites are not a realistic concern for healthy individuals. Some tarantula species use hair-flicking as a defensive behavior, which can irritate the skin, but this is not medically significant. Allergic reactions to tarantula venom are possible but extremely uncommon. The actual risk of encountering or being bitten by a tarantula in Wyoming is very low. For more on tarantula in Wyoming, see ourWyoming tarantula guide.
How to Recognize One
Tarantulas are very distinctive spiders that are unmistakable once you know what to look for in Wyoming. They are large spiders with leg spans typically ranging from 4 to 6 inches, with some females reaching larger sizes. Their bodies are covered in fine hairs ranging in color from brown to black, sometimes with tan or reddish highlights depending on the species. The body has two main segments: the front section (cephalothorax) and the rear section (abdomen). Female tarantulas are noticeably larger than males and live much longer, sometimes reaching 15 to 20 years in the wild. Males are smaller with much shorter lifespans, typically 3 to 6 years. Tarantulas have eight eyes but rely more on sensing vibrations through the ground than on eyesight. Their legs are thick and sturdy with flexible joints that let them move quickly when threatened. Rather than building typical webs to catch flying insects, tarantulas burrow into soil or hide under rocks and logs where they wait for prey. They are generally slow-moving except when startled or actively hunting. Males sometimes wander when searching for mates. You can also browseWyoming wildlife.
What to Do If You Are Bitten or Stung
If you are bitten by a tarantula in Wyoming, stay calm and follow these appropriate steps. First, wash the bitten area with soap and water. Keep the bitten area still and do not move the limb excessively, as movement can affect venom distribution. Remove any rings, bracelets, watches, or tight clothing near the bite site to prevent problems from swelling. Elevate the bitten limb if possible to help reduce swelling. Seek medical care to have the bite evaluated by a healthcare provider. 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 attempt to cut, suck, or squeeze a bite wound. Do not apply ice directly to the skin. Do not use tourniquets or restrict blood flow. Do not apply any topical medications without medical guidance. Most tarantula bites require only rest and observation as treatment. Healthcare providers in Wyoming are familiar with tarantula encounters and can provide appropriate care if needed.
How to Prevent Encounters
Preventing tarantula encounters in Wyoming is straightforward since the actual risk is minimal. When hiking or working outdoors in southern and western Wyoming where tarantulas live, wear closed-toe shoes and long pants as general protection for feet and legs. Shake out shoes, boots, and clothing if you have been in rocky or brushy areas. Check dark corners and spaces in garages, sheds, or basements before reaching into them. If you keep wood piles or debris storage outdoors, position them away from your home and inspect them occasionally. Seal obvious gaps around doors and windows as part of regular home maintenance. Keep your yard and immediate surroundings free of excessive leaf litter and dead wood. When camping in southern Wyoming near the mountains or in basin areas, inspect your tent, sleeping bag, and gear before use. If you encounter a tarantula while outdoors, simply move away from it calmly. These spiders are not aggressive and will not pursue you. They are far more interested in leaving you alone than in confronting you.
Where in Wyoming and When
Tarantulas in Wyoming are most common in southern and western regions of the state, particularly in semi-arid and arid areas like the Bighorn Basin and areas surrounding the Bighorn Mountains. The southern Wyoming landscape near the Colorado border also supports populations. They are less common or absent in northern Wyoming, the high mountains, and areas with severe winters. Tarantulas prefer semi-arid climates with distinct seasons but not extreme cold. In Wyoming, they are most active and visible during warm months, from late spring through fall. Males of some species become particularly active and visible in late summer and early fall when they leave their burrows to search for mates. This wandering behavior can lead to more frequent sightings during these months in suitable habitat. During winter, tarantulas remain dormant in their burrows as temperatures drop. Most encounters occur when people explore rocky terrain, canyon areas, or semi-arid habitats suitable for tarantulas. Indoor encounters are extremely rare. Even in regions where tarantulas live in Wyoming, they are shy and nocturnal, so many residents may never encounter one.
Harmless Lookalikes
If you see a large spider in Wyoming that resembles a tarantula, it is likely one of several harmless native species. Wolf spiders are the most common misidentification in the state. They range from small to quite large and are brown or tan with lighter markings. Wolf spiders have better eyesight than tarantulas and are more active and alert in their movements. They actively hunt prey rather than waiting in burrows. Huntsman spiders can also resemble tarantulas and are sometimes found in homes or sheds. These large spiders are not dangerous despite their intimidating appearance and actually help control insects. Funnel weavers are large spiders that build funnel-shaped webs and hide in corners of structures. They can look alarming but are completely harmless. Fishing spiders are found near water sources and excellent swimmers. They are brown or gray and fairly large but pose no threat to people. Yellow sac spiders are small to medium-sized spiders sometimes found indoors. They have a yellowish color and are completely harmless. Most large spiders encountered in Wyoming are these harmless native species.
Frequently Asked Questions
Q: Are tarantulas deadly in Wyoming? A: No, tarantula bites are not deadly in Wyoming or anywhere in North America. Bites are extremely rare and typically cause only minor pain similar to a bee sting. Medical emergencies from tarantula bites are not a concern for the state. Q: How common are tarantula bites in Wyoming? A: Tarantula bites are extraordinarily rare in Wyoming despite the presence of spiders in southern and western regions. They only bite if handled roughly or feel they cannot escape, so bites almost never occur in the wild. Q: What should I do if I see a tarantula in Wyoming? A: Simply move away from it and allow the spider to leave. Take a photo if you are interested. The spider will not chase you. For identification help and more information, visitour wildlife guidesor exploreWyoming wildlife resources. Most people appreciate tarantula sightings as part of Wyoming's natural biodiversity. Q: Could a tarantula enter my home in Wyoming? A: Tarantulas occasionally wander into homes, particularly in southern Wyoming during late summer or fall. If one enters your home, calmly capture it in a container and release it outside. They will not bite unless handled roughly or threatened.
Frequently asked questions
Are They in Wyoming?+
Yes, tarantulas are established in Wyoming and represent a natural part of the state's wildlife. Several Aphonopelma species occur across southern and western Wyoming, where they have lived for generations. The Bighorn Basin, areas surrounding the Bighorn Mountains, and regions near the Colorado border support populations. Tarantulas are most common in the semi-arid and arid portions of Wyoming where suitable habitat exists. They are less common or absent in the northern parts of the state and in high elevation areas where winters are severe. Despite their presence across parts of Wyoming, actual encounters remain uncommon since these spiders are shy and reclusive. They spend most of their time hidden in burrows or beneath rocks and debris. Most Wyoming residents who live in regions where tarantulas occur may never see one in the wild. For specific information abouttarantula in Wyoming, explore resources aboutWyoming wildlife. Tarantulas are a harmless and normal part of Wyoming's diverse ecosystem.
How Dangerous Is It?+
Tarantulas are significantly less dangerous than their large, hairy appearance suggests to people unfamiliar with spiders. These are docile creatures that will only bite if handled roughly or if they feel completely trapped with no escape route. A tarantula bite feels similar to a bee sting and causes only minor localized pain or swelling. Healthy adults experience mild symptoms that typically resolve within hours or a day or two. Tarantula venom is weak and causes no serious systemic effects in humans. No deaths have been reported in North America from tarantula bites in modern times. People throughout Wyoming and beyond keep tarantulas as pets, demonstrating their docile nature through thousands of safe interactions annually. Serious medical complications from tarantula bites are not a realistic concern for healthy individuals. Some tarantula species use hair-flicking as a defensive behavior, which can irritate the skin, but this is not medically significant. Allergic reactions to tarantula venom are possible but extremely uncommon. The actual risk of encountering or being bitten by a tarantula in Wyoming is very low. For more on tarantula in Wyoming, see ourWyoming tarantula guide.
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