Quick Answer
Arizona has more scorpion species than any other US state (over 30). The most important is the Arizona Bark Scorpion (Centruroides sculpturatus), which is the only medically significant scorpion in the US. It is small (2-3 inches), pale yellow to tan, and has a slender tail with a small bulb at the base of the stinger. Other species include the Giant Hairy Scorpion (4-5 inches, mild venom) and the Striped Tail Scorpion (1.5-2 inches, mild venom). Arizona Bark Scorpion stings can be serious, especially for children.
Arizona Scorpion Species Guide
Arizona is famous for its scorpions. With over 30 species, the state has more scorpion diversity than any other in the US. While most are harmless, the Arizona Bark Scorpion is the most venomous scorpion in North America.
Arizona Scorpion Comparison
| Species | Size | Color | Venom Risk | Habitat |
|---|---|---|---|---|
| Arizona Bark Scorpion | 2-3 inches | Pale yellow to tan | High (medically significant) | Bark, woodpiles, inside homes |
| Giant Hairy Scorpion | 4-5 inches | Dark brown to black | Low (mild sting) | Desert, under rocks, burrows |
| Striped Tail Scorpion | 1.5-2 inches | Yellow with dark tail stripes | Low | Desert, under rocks |
| Arizona Hairy Scorpion | 2-3 inches | Brown, hairy | Low | Desert, burrows |
| Yellow Ground Scorpion | 1-1.5 inches | Yellow | Low | Under rocks, in soil |
Arizona Bark Scorpion: The Dangerous One
The Arizona Bark Scorpion is the most venomous scorpion in the United States. Its sting can cause severe pain, numbness, tingling, and in some cases, difficulty breathing, muscle twitching, and involuntary eye movements. It is small (2-3 inches), pale yellow to tan, and has a slender tail with a small bulb (tubercle) at the base of the stinger. It is an excellent climber and is commonly found in homes, especially in Phoenix, Tucson, and Scottsdale.
Scorpion Prevention in Arizona
- Seal all cracks and gaps in the foundation (1/16 inch minimum)
- Install door sweeps on all exterior doors
- Remove woodpiles, rock piles, and debris from near the house
- Trim vegetation away from the foundation — avoid using rocks as landscaping
- Use a UV (blacklight) flashlight at night to inspect for scorpions
- Consider professional pest control for perimeter treatments
Scorpion Sting Treatment
If stung by an Arizona Bark Scorpion:
- Stay calm and call Poison Control (1-800-222-1222)
- Wash the area with soap and water
- Apply a cold compress to reduce swelling
- Take acetaminophen or ibuprofen for pain
- Seek emergency care if symptoms are severe (difficulty breathing, muscle twitching, roving eye movements)
- Antivenom (Anascorp) is available for severe cases
FAQ: Arizona Scorpions
How common are bark scorpions in Phoenix?
Arizona Bark Scorpions are very common in the Phoenix metropolitan area, especially in newer developments built on former desert land. Some neighborhoods have high infestation rates.
Can Arizona Bark Scorpion stings be fatal?
Fatalities are rare with modern medical care. Children and the elderly are at highest risk. Antivenom is available and effective. No deaths have been reported in Arizona in recent years from scorpion stings.
Professional Wildlife Removal in Arizona
If you need professional wildlife removal or pest control services in Arizona, our local guides cover the following cities:
- Phoenix, AZ — Wildlife & Pest Identification Guide
For help identifying the specific animal causing damage in your yard, see our What Animal Is Digging Holes in My Arizona Yard? guide.
Sources: US Fish and Wildlife Service, USDA Wildlife Services, state wildlife agencies, CDC, academic extension services. This guide is for informational purposes only and does not constitute professional wildlife management advice.