The Abominable Snowman, known as Yeti by the locals, is simply a variation on the Bigfoot form. Just as man, migrating, has evolved to fit his environment, so the Yeti adjusted to the climate when it changed after a pole shift. White fur increases the survival in snowy surroundings, and like Snow Bunnies, Yetis born with white fur were more likely to escape predators and grow to adulthood and propagate. There are fewer Yeti than Bigfoot, as having adapted to the snowscape, they cannot safely leave.