Arizona Bark Scorpion
Centruroides sculpturatus
Buthidae, Order Scorpiones (Note: Though not a spider, scorpiones belong to the same class Arachnida, characterized by large pedipalps with pincers and a segmented tail ending in a stinger)
Physical Description
Elongated body consisting of a cephalothorax and a segmented abdomen ending in a slender tail (metasoma) with a telson stinger. Features powerful, slender pedipalps (pincers) used for capturing prey.
Size Estimate
Adults range from 2 to 3 inches in total length. The specimen shown appears to be a typical adult or sub-adult.
Coloration & Markings
Yellowish to light brown coloration, often with faint longitudinal stripes on the carapace and abdomen to help with camouflage in desert environments.
Web Type
Does not spin webs. It is an active nocturnal ground hunter that relies on stealth and ambush.
Eye Arrangement
Possesses a pair of median eyes near the top center of the cephalothorax and several smaller lateral eyes along the front margin.
Leg Characteristics
Four pairs of slender walking legs configured for rapid movement across various terrains, including vertical surfaces.
Venom & Safety Information
Venom Information
Neurotoxic venom that is the most potent of any scorpion species in North America. Dangerous to humans, causing severe pain, numbness, tingling, and potentially systemic symptoms.
Medical Significance
Medically significant. A sting can be very painful and dangerous, especially for children, the elderly, or pets. Requires medical attention if severe systemic symptoms like muscle twitching or breathing difficulty occur; an antivenom is available.
Safety Recommendations
Seal home entry points, shake out shoes and clothing before wearing, wear gloves when gardening, and use tongs or professional pest control if removal is necessary. Seek medical help for severe stings.
Habitat & Behavior
Habitat & Range
Native to the southwestern United States (primarily Arizona) and northwestern Mexico. Prefers arid and semi-arid regions, hiding under rocks, bark, and debris, and frequently enters homes in search of moisture.
Behavior & Temperament
Nocturnal and highly agile. Known for its ability to climb vertical surfaces and walls. Will sting readily if disturbed or pressed against human skin.
Diet & Prey
Carnivorous. Feeds primarily on insects such as crickets, roaches, and beetles, using its pincers to grab prey and its stinger to subdue it.
Seasonal Activity
Most active during the warm spring, summer, and fall months. During winter, they undergo brumation in protected underground cavities or indoor wall voids.
Description
The Arizona Bark Scorpion is a fascinating yet notoriously venomous arachnid native to the American Southwest. Highly adaptable, it is the only North American scorpion capable of climbing smooth vertical walls easily, often leading to indoor encounters. Its slender build and potent neurotoxic venom make it a species requiring cautious respect.
Key Features
Slender body and tail, pale yellowish-brown color, slender pincers, and the ability to climb vertical walls.
Similar Species
Stripe-tailed scorpion (Vaejovis punctatus), which is stouter, darker, and has thicker pincers.
Life Cycle
Females give birth to live young (not eggs). Newborns climb onto the mother's back and stay there until their first molt, after which they disperse. Lifespan can reach several years.
Ecological Importance
Acts as an effective predator of desert insects, helping to control pest populations, while serving as prey for larger desert animals like owls and rodents.
Conservation Status
Not evaluated by the IUCN, but highly abundant within its native range and resilient to habitat modification.
Interesting Facts
Bark scorpions fluoresce a bright blue-green color under ultraviolet (UV) light, making them easy to spot at night with a blacklight.
Photography Tips
Photograph safely from a distance using macro lenses. To capture fascinating details, use a UV flashlight at night to make the scorpion fluoresce.
Identified: 2026-07-28T23:20:25.608423