Not based on true events

Carol was a silvery-grey squirrel with a luxurious bushy tail. Carol’s family members were all silvery-grey squirrels with the same type of bottle-brush tail. And, of course, the same could be said of all her relations and acquaintances but one. And that one was white, and was so well known in his area of forest that none took surprise at beholding him. No, not even Carol. She, in fact,boasted to her brother once that no colour, or absence of such, could surprise her. No, not even if the colour was blue with pink spots. But, I am afraid  she was  wrong on that point, even though squirrels are rarely wrong. For, even the day after this declaration, she received a surprise, no, not a surprise, but a full and complete shock. She was making her rounds of her territory, climbing up boughs, scurrying from tree to tree, chasing trespassers and nibbling upon any cone or nut which came her way. But, suddenly, Carol thought no more of that, for she had come to a lone cottage, and in that cottage was a window, and in that window she peered, only to leap many times her height in the air in startlement, and nearly rolled off the roof in consequence. Thankfully, though, she caught herself, and crept up the rough sweet-smelling wooden slates to take another look, and what was there but a black squirrel doing the same as she! They touched noses through the glass, but Carol then shook her head violently in utter disbelief. No! It could not be ! It was but a trick  of the reflection! But even as she did so, she noticed that the other squirrel did not mirror the action.  Immediately, her temper got the best of her wonder, and with a vicious charge, she burst at the window. Black or not, it was an intruder, thought she. Not much of one evidently, for hardly had Carol neared the pane when the other squirrel dashed in frenzied terror from it, leaping onto the floor within and bounding underneath  the covers of a bed where it hid for a long, long time. Carol watched its disappearance with evident satisfaction, and after a disdainful snort at cowardice, traipsed off. For, though she was quite surprised at the novel hue, at least she was not overcome by it.

Eastern Grey Squirrell
Sciurus carolinensis

This squirrel can be black or white as well as grey. Before the land was developed, Eastern Grey Squirrels could be found mostly in large forests, but now they can also be found in cities. Like the American Red Squirrel, they cache food and can find it several months afterwards, but those caches which are forgotten fulfill the task of reforestation. Eastern Grey Squirrels are uncommon or local dwellers in Saskatchewan but are common in Manitoba.