This common name came from “Scorpiones”. Scorpions are not insects but are predatory arachnids, which feed on soft-bodied insects and other arthropods. They occupy habitats ranging from the mountains to the low desert. Nocturnal hunters and are active at temperatures greater than 77° F. Bark scorpions generally hide under tree bark, leaves, and debris. They are common in mesquite, cottonwood and sycamore groves in river areas. Bark scorpions are the only climbing scorpions and are the most likely species to be found in houses, especially on newly developed land.
They shun light, hiding or burrowing during daylight hours. Remember all scorpions are venomous. The largest scorpion in the state is the Desert Hairy (Hadrurus arizonensis). The sting of the Bark Scorpion (Centruroides exilicauda), in particular, can be fatal, especially to the very young and very old. There is very little redness or swelling, but the sting is very painful. The venom is neurotoxic and affects the entire body (particularly the nervous system), causing fever, increased heart rate, restlessness, and other symptoms. If you suspect you have been stung, contact your physician and the poison control center immediately.
Caution should be exercised when camping or engaging in other outdoor activities, to ensure that scorpions have not found their way into footwear, clothing, sleeping bags or other equipment. If you suspect your house is infested, a professional exterminating service is your best solution.