An accidental discovery by scientist Jonathan G. Martin lead to a surprise at his bird feeder. Turns out Flying Squirrels in the United States have a special trait. Under ultraviolet light they glow.
Ultraviolet light makes flying squirrels turn PINK! image: Northland College
If you want to know more about the particulars of ultraviolet light here’s a link to a LiveScience.com article.
Look grammar police, it’s octopuses and we don’t have to like it, BUT you are going to love learning that just like humans, octopuses do seem to have a preferred