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Whip Scorpions Are Among The Largest Arachnids Commonly Found In Arizona Homes, But They Are Not As Menacing As They Appear To Be

One of the largest arachnids found in Arizona is the tailless whip scorpion. At first glance, whip scorpions look like large spiders, but upon closer inspection, a whip scorpion may look like a mix between a spider and a scorpion. In reality, whip scorpions are neither spiders or scorpions; instead, whip scorpions belong to the Amblypygi order of arachnids. The tailless whip scorpion species found in southern Arizona, P. mexicanus, grows to be around 1 to 2 inches in body length, but their long legs can make them appear much larger. Luckily, whip scorpions do not possess a stinger or pincers, but their long front legs are easily mistaken for pincers. Whip scorpions can use their mouthparts to inflict a pinch to human skin, but these arachnids are not considered medically significant pests to humans, and they do not possess venom glands. Although whip scorpions prefer to dwell beneath tree bark, hollow logs, pre-constructed animal burrows and even termite nests, these bizarre-looking arachnids are sometimes found within homes, particularly in basements and below sinks.

Whip scorpions remain hidden beneath rocks, tree bark and leaf litter during the daytime, but at night, these nocturnal arachnids hunt for prey in the dark by using a pair of front legs as a sensory organ. These arachnids are sometimes found crawling vertically along walls within homes, but they are found more frequently within largely uninhabited structures, like garages, barns, pool houses and sheds. Whip scorpions can be hard to capture and/or kill due to their fast crawling speeds, and they are capable of crawling sideways. Despite being completely harmless to humans, it is not uncommon for pest control professionals to get calls from spooked homeowners who describe the arachnid’s unusual appearance, and how they can be kept out of homes. Therefore, whip scorpions are merely aesthetic insect pests within homes.

Have you ever found a whip scorpion within your home or other structure?

 

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