Why Do Scorpions Glow Under Ultraviolet Light

Under UV light, almost all species of scorpions glow a bright green color, but why? A study led by Carl T. Kloock in 2011 found that the fluorescence seemed to help scorpions detect and avoid ultraviolet light.

In 2012, further research published in the journal Animal Behavior by Douglas Gaffin of the University of Oklahoma tested how scorpions reacted to both ultraviolet and blue-green light with their eyes blocked and unblocked. They showed a stronger avoidance reaction to ultraviolet light than expected from the sensitivity of their eyes, and even stronger avoidance when they were exposed to green light with their eyes blocked.

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