Yahoo

From Wild Southwest Wiki

Yahoos may or may not exist. Some claim they're just a fireside story used to frighten children and the gullible. Others insist that they're real, and some even claim to have seen them for themselves. If they do exist, there probably aren't many of them, which would account for their semi-legendary status.

Yahoos are said to be a kind of wild primate. Some theorise they are mutated descendants of humans - others of apes and monkeys released from animal parks and zoos in the chaos of the Great War. They are said to be slightly shorter than humans, very hairy, foul smelling, and to travel in small packs. They are said to attack travelers for no discernible reason and be extremely vicious.