06/17/2026
Arizona is home to more than 30 species of scorpions, but the Arizona bark scorpion is the one that causes the most concern because it has the most medically significant venom in North America.
Common Scorpions Found in Arizona
Arizona Bark Scorpion
Light tan to yellow-brown color.
Usually 2–3 inches long.
Can climb walls, ceilings, trees, and rough surfaces.
Frequently found in homes and garages.
Most venomous scorpion in Arizona.
Arizona Giant Hairy Scorpion
Largest scorpion in North America, reaching over 5 inches long.
Less dangerous than the bark scorpion despite its size.
Usually found in desert burrows.
Arizona Stripetail Scorpion
One of the most common scorpions in the state.
Yellowish with dark stripes on its back.
Sting is painful but generally not medically dangerous.
Where Scorpions Hide:
Scorpions prefer cool, dark places and are commonly found:
Under rocks, wood piles, and debris
Around landscaping and irrigation systems
In garages, sheds, and storage areas
Inside homes near bathrooms, laundry rooms, and closets
Around cracks, door gaps, and wall voids
Interesting Facts:
Scorpions are nocturnal and hunt at night.
They glow blue-green under ultraviolet (black) lights, making nighttime inspections easier.
Female bark scorpions can give birth to 25–35 live young, which ride on their mother’s back until their first molt.
Bark scorpions can squeeze through openings as small as 1/16 inch.
If You Are Stung:
Most stings cause intense pain, tingling, numbness, and swelling. Children, older adults, and people with medical conditions should seek immediate medical attention. If symptoms are severe, call 911 or contact the Arizona Poison & Drug Information Center.
Scorpion Prevention Tips:
Seal cracks and gaps around doors, windows, and utility lines.
Reduce clutter and wood piles around the home.
Trim vegetation away from structures.
Control insects, which are a food source for scorpions.
Use a black light at night to inspect around foundations and landscaping.
For Arizona homeowners, the bark scorpion is the species to watch for, especially during the warmer months when scorpion activity increases.
