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Scorpions (Scorpiones)
Scorpions are venomous arachnids found primarily in arid and semi-arid regions, with most U.S. species causing only localized pain and swelling with their sting, though the Arizona bark scorpion is a genuine medical threat capable of causing severe, potentially life-threatening reactions. They are nocturnal hunters that hide during the day under rocks, in wood piles, and inside shoes and bedding. Their flat body shape allows them to squeeze through incredibly small cracks to enter homes. Professional perimeter treatments, exclusion sealing, and reducing outdoor harborage sites provide the most comprehensive protection.