sometimes marmots are called whistle pigs. (you likely have marmots where you are in CO. they are benign creatures)
It's all coming together. Where I grew up we had groundhogs aka woodchucks, moles, and voles. Where I live now, we have marmots, pikas, prairie dogs, and voles (not sure about moles, so far the cat has just brought home voles). Also in CO there are 5 (or more) varieties of "ground squirrels" which on the east coast would have been called a chipmunk which may just be one of the varieties of ground squirrels, though that's another confusing point.
I do love the marmots, they really tease the dogs while we are hiking, and do not live in the same type of environment I attempt to garden in, so no hard feelings.