Flying squirrels need to eat truffles as part of their diet, so maybe the truffles make the squirrels glow pink as part of their reproductive strategy. Since tr

Flying squirrels need to eat truffles as part of their diet, so maybe the truffles make the squirrels glow pink as part of their reproductive strategy. Since truffles live underground, they can’t reproduce unless some animal digs them up and eats them, so it would make sense to try to confer some sort of social status to the animals that are good at finding them.