My father insisted that these lived in the wilds of Maine and loved to tells us about them.
There are two types of side-hills. There's the left-side-hill gouger and the right-side-hill gouger. Each has legs longer on one side than the other from going around the mountain the same way all the time. They have long claws to help them dig into the hillside as they go around and around the same way. They never come down on the flatland because they are lopsided. The only way you can catch them is get them down on a piece of flat ground, because they can't run on flat ground.