Scorpions in South Florida: What You Need to Know and How to Keep Them Out

South Florida has one primary scorpion species that residents encounter: the Florida bark scorpion, also called the Hentz striped scorpion (Centruroides hentzi) or Caribbean bark scorpion (Centruroides gracilis), depending on the sub-region. Both species are present in Broward and Palm Beach counties and are very similar in behavior: (1) Appearance: 2–3.5 inches long, yellowish-brown to reddish-brown with darker stripes on the body. Slender pincers and a curved stinger-tipped tail carried upward. (2) Behavior: Strictly nocturnal. During daylight hours they hide under bark, in mulch, under rocks, in wall voids, in closets, in shoe boxes, and in folded clothing or towels. They become active at night seeking prey (crickets, roaches, silverfish, other small insects). (3) Venom: Florida bark scorpion sting is painful — characterized by immediate burning pain, local swelling, and numbness at the sting site. In most adults, symptoms resolve within a few hours to 1–2 days. The Florida bark scorpion is NOT the same species as the Arizona bark scorpion (Centruroides sculpturatus), which can cause serious systemic symptoms. Florida bark scorpion stings are not considered medically serious for healthy adults. (4) Risk to children, elderly, and allergic individuals: Young children, elderly adults, and individuals with known insect venom allergies should seek medical evaluation after any scorpion sting in South Florida, even though life-threatening reactions are rare with our native species.

Scorpions in South Florida homes are consistently found in the same predictable locations: (1) Garages — the non-air-conditioned garage is the most common scorpion harborage in South Florida. Warm, dark, with cracks in the floor and lots of harborage material (cardboard boxes, equipment, stored furniture). Florida bark scorpions enter garages through the base of the garage door, gaps around the door frame, and from adjacent mulch beds. (2) Closets and storage areas — scorpions hide in the narrow dark spaces between stored items, inside shoe boxes, folded in clothing stored on floors, and behind items on shelves. The classic 'scorpion in the shoe' scenario is real — always shake shoes, gloves, and clothing before putting them on if scorpions are present in your home. (3) Bathrooms — scorpions can enter through drains and gaps under sink cabinets. Found in corners behind toilets and under vanity cabinets. (4) Attics — scorpion populations in attics can be significant and difficult to detect, as they move through wall voids between the attic and living areas. (5) Exterior under mulch — the primary outdoor harborage is under organic mulch, under fallen bark, under rocks, and in the soil-mulch layer adjacent to the foundation. This is where perimeter treatment is most effective.

Scorpion entry events in South Florida follow several triggers: (1) Construction or landscaping activity — disturbances to existing mulch, rock borders, or soil adjacent to the home dislodge established scorpion populations and drive them to seek shelter inside. New mulch installation is a particularly common trigger, as fresh mulch being installed over areas where scorpions were established forces them toward the structure. (2) Prey availability — scorpions follow their food. Homes with high populations of crickets, silverfish, or roaches have food sources that attract and sustain scorpion populations. Addressing the prey pest population is important for long-term scorpion control. (3) Seasonal dryness — dry periods drive scorpions to seek moisture, often moving them toward HVAC-cooled home interiors. The late dry season (March–May) and post-wet season drying (November) are periods when scorpion entry events are more common. (4) New neighbors' pest treatment — if neighboring properties receive pest treatment, prey insects and scorpions from those properties can migrate toward untreated properties. (5) Entry point gaps — scorpions squeeze through remarkably thin gaps. New construction, remodeling, or any opening created in the foundation/exterior wall can create entry routes that were previously sealed.

Effective scorpion elimination requires multiple simultaneous approaches: (1) Professional perimeter spray — residual insecticide applied to the foundation base, garage interior, mulch areas adjacent to the home, and exterior entry points. Scorpions crossing the treated zone die on contact. The same treatment that addresses roaches, ants, and earwigs is the foundation of scorpion control. (2) Prey reduction — because scorpions follow their prey, our Pest Shield treatment targets the crickets, silverfish, roaches, and other insects that scorpions feed on. Eliminating the food source is critical for long-term scorpion reduction. (3) Habitat modification — remove mulch from the foundation perimeter (12–18 inch bare zone), remove wood piles and debris adjacent to the structure, eliminate any dark-damp harborage areas immediately adjacent to the home. (4) Seal entry points — scorpions enter through surprisingly small gaps. Seal gaps under exterior doors (install door sweeps), caulk gaps around utility penetrations, seal expansion joints in the garage floor and foundation. Install weather-stripping under the garage door. (5) UV light at night — scorpions fluoresce brilliant blue-green under UV (black) light. Conducting a nighttime UV-light inspection of your property before and after treatment allows you to assess population size and treatment effectiveness. Hardware store UV flashlights work for this purpose. (6) Glue boards — placed along interior walls in garages and storage areas, glue boards capture scorpions and provide both population monitoring and reduction.

For Florida bark scorpion stings in otherwise healthy adults: (1) Wash the sting site immediately with soap and water. (2) Apply a cold pack to reduce local swelling and pain. (3) Take an OTC antihistamine (diphenhydramine/Benadryl) for any allergic component of the reaction. (4) OTC pain reliever (ibuprofen or acetaminophen) for pain management. (5) Seek medical attention if: symptoms spread beyond the local sting site (numbness, tingling, muscle twitching throughout the limb or body), you experience difficulty breathing, swallowing, or speaking, you have known insect venom allergy, the sting victim is a young child or elderly adult, or symptoms don't begin improving within 2–4 hours. Florida Poison Control hotline: 1-800-222-1222. Important: Florida bark scorpion stings are NOT the same severity as Arizona bark scorpion stings. If you tell a Florida emergency room you were stung by a scorpion, be prepared to specify species and that it was not the Arizona bark scorpion, as treatment protocols differ significantly. In South Florida, bark scorpion stings are treated symptomatically; antivenom is not used or available for Florida species.