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Flying Squirrels Secretly Glow Pink

Forestry professor Jon Martin was out in the woods of Wisconsin at night, using a UV flashlight to search for fluorescent lichens, fungi, and any other fluorescent life, when he encountered a flying squirrel. He pointed his flashlight at it, and was astonished to see the rodent glow in a bubblegum pink color! Martin contacted biologist Paula Spaeth Anich, and together they set out to investigate. They checked out specimens of all three species of North American flying squirrel at museums. All but one specimen glowed under UV light, while non-flying squirrels did not.

While other animals fluoresce—puffins’ bills and chameleon’s bones give off an eerie, blue glow under UV light, for example—the only other mammals known to have fluorescent fur are about two dozen species of opossum. These marsupials, scattered across the Americas, aren’t closely related to flying squirrels, live in different ecosystems, and have a different diet.

But flying squirrels do share one thing with the opossums: they’re all active at night and twilight, where other squirrels are mostly diurnal.

Read more about fluorescent pink flying squirrels at National Geographic, and since that sounds like a hallucination, see photographic evidence of their pink fluorescence.  -via Metafilter

(Image credit: Cephas)

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