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Is it true that scorpions glow under UV light?

April 5, 2026

Quick Answer

Scorpions can indeed fluoresce under ultraviolet (UV) light, which is a result of their biofluorescence properties. This trait is due to the presence of specific molecules in their cuticle, which absorb light and emit it back at a different wavelength, making them visible under UV illumination.

Understanding Desert Scorpion Behavior

When exploring desert environments, especially at night, carrying a UV flashlight can be a useful tool for spotting scorpions. Many species, such as the bark scorpion (Centruroides exilicauda) and the striped bark scorpion (Centruroides hentzi), exhibit this biofluorescence. It’s essential to note that not all scorpion species display this trait, but a significant number do.

Recognizing UV-Fluorescent Scorpions

To identify UV-fluorescent scorpions, follow these steps: first, locate the scorpion using a red light flashlight to avoid startling it, then switch to a UV light source to observe the biofluorescence. Typically, UV-fluorescent scorpions will exhibit a blue or whitish glow on their bodies, often more pronounced on their exoskeletons and pedipalps. Keep in mind that UV light may not be visible to the human eye until it is amplified or intensified, often through specialized flashlights or instruments.

Safety Precautions When Handling Scorpions

When encountering UV-fluorescent scorpions, exercise extreme caution to avoid getting stung. Always wear protective clothing, gloves, and eyewear when handling scorpions. If you must pick up a scorpion, use a pair of tweezers or a plastic container to minimize the risk of being stung. Never touch a scorpion with your bare hands or fingers, as this can increase the risk of an allergic reaction or a severe sting.

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