A team of researchers from the University of Georgia, who published their findings in the journal Ecology & Evolution, found that some North American bat species can actually glow under ultraviolet light. Why? That part’s still a mystery.

Researchers examined 60 museum specimens from six species and found that each specimen emitted a greenish glow when exposed to UV light. All of the bats glowed the same color and in the same spots: their wings, hind legs, and that stretchy bit between them.

This is weirdly uniform behavior for nature, which usually loves mixing things up across species, especially when it comes to more showy, eccentric traits reserved for impressing mates or intimidating rivals.

Since these glowing zones on bats don’t seem to vary by species, sex, or age, scientists th

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