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House Scorpions: What They Eat, Why They Enter Homes, and How to Stay Safe

Scorpions help control invertebrates in nature, but there is no measured evidence that they reliably reduce household pests. Learn what they eat, why they may enter, and how to reduce access safely.

By Bettesworth Construction Team 3 min read
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Scorpions are predators of insects and other small invertebrates, so they contribute to natural biological control. That does not mean they are a reliable way to control household pests: the available sources do not measure any reduction in pests inside homes. Whether a scorpion is welcome—or dangerous—depends on the local species and circumstances.

What do scorpions eat?

Scorpions are arachnids, not insects. They have eight legs and pincers, and many hide by day and hunt at night. Their prey varies with species, size, habitat, and what is available. Alabama Cooperative Extension describes them as opportunistic predators of invertebrates; Texas A&M and Utah State University Extension also list small insects, spiders, centipedes, and other scorpions among their prey. Texas A&M includes earthworms as well.

Utah State University Extension describes scorpions as ambush predators: they sense approaching prey, seize it with their pincers (pedipalps), and may use venom to paralyze it. They consume liquefied food rather than swallowing solid chunks. These are broad natural-history descriptions, not evidence that every species actively hunts inside houses.

What does “pest controller” mean in a house?

By eating insects and other arthropods, scorpions play a part in natural biological control. Alabama Cooperative Extension explicitly describes that ecological role. But the sources cited here do not quantify how many household pests a scorpion removes, or show that scorpions reliably suppress pest populations inside homes. Their presence is not a substitute for addressing an infestation, and keeping one indoors is not an established pest-control method.

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Why might a scorpion enter a home?

Scorpions may enter through gaps or seek shelter, water, or prey; the route and circumstances vary by species and location. A region-specific example is the Arizona bark scorpion, which the University of California Statewide IPM Program says can enter buildings through very small gaps. Its guidance covers Arizona and limited nearby areas of California and New Mexico, not every scorpion found in the Southwest or elsewhere.

Construction details matter because small openings around eaves, pipes, doors, and screens can provide entry points. Sealing gaps and maintaining barriers can help reduce access, but no single measure guarantees a scorpion-free home.

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Are scorpions in the house dangerous?

There is no sound single danger ranking for all regions. Risk depends on the species, the person stung, and the location. UC IPM identifies the Arizona bark scorpion as dangerous to people and says its stings can cause severe symptoms that require immediate medical attention. The same guidance says many stings from other scorpions it discusses cause localized symptoms. Alabama Cooperative Extension, by contrast, says native Alabama species are not known to pose a serious concern to people or pets. These statements apply to their respective regions and should not be generalized.

  • Do not handle or try to capture an unidentified scorpion if doing so could put you at risk.
  • After a suspected sting, seek local medical or poison-control guidance. Seek immediate medical attention for severe symptoms or an allergic reaction; do not use this general guidance to diagnose a sting.

How can you reduce the chance of scorpions entering?

UC IPM recommends reducing hiding places near the house and improving exclusion:

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  • Seal cracks around eaves and pipes.

Outdoor lighting can also affect the insects scorpions prey on. UC IPM notes that insect-attracting lights may attract scorpions feeding on those insects and suggests less insect-attractive yellow lighting where scorpions are prevalent. Pesticides may be ineffective when scorpions are hidden in cracks and crevices. If you use a pesticide, follow its label directions.

Can a blacklight help you find scorpions?

A portable ultraviolet (UV) blacklight can help survey around a home at night: scorpions glow under UV light, according to UC IPM and Utah State University Extension. It is an observation aid, not a repellent or treatment. Finding a scorpion with a blacklight does not identify its species, so do not handle it to get a closer look.

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Why regional guidance matters

Scorpion species, entry behavior, prey, and sting concerns differ by region. UC IPM’s information about the Arizona bark scorpion is specific to Arizona and limited nearby areas of California and New Mexico; Alabama Cooperative Extension’s comments concern native Alabama species. Neither should be treated as a universal account. For a scorpion found in or near a home, use guidance from a credible local extension or pest-management service, especially if you are unsure of the species.

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