Naturally... we have a lot of squirrels.
I found the part about them generating heat with their tails fascinating. Several years ago I had a very spunky squirrel that my younger grand-daughter named Alex (because we were unsure if it was male or female and thought Alex was the best name that would work either way).
Alex, while not particularly large, ran all of the other squirrels away from the squirrel feeder whenever she (I like to think it was a girl since it was so formidable lol) wanted to feed. I always laughed at the super aggressive tail shaking that she displayed... now it makes perfect sense!