Native to the western united states, the Yellow-Bellied Marmot (Marmota flaviventris) is one of many species of marmot, which in turn is a type of ground squirrel. They weigh up to 11lbs, hibernate in the winter, and live off an omnivorous diet. They also like to lounge on rocks looking awesome. They also happen to be the best studied marmot species. Additionally in the fun fact department, marmots and other ground squirrels do not have tails because they simply aren't useful, and lost them during their evolution around 2 million years ago. Badgers like to eat them (the marmots, not their non-existent tails).
image from scary squirrel world