Rock Squirrels (Spermophilus variegatus) are frequently mistaken for prairie dogs as well. Generally a good look at the bushy tail or ears will suffice to identify the squirrel. The burrows, however, are a bit more 
difficult to differentiate as given the opportunity the squirrels frequently use prairie dog burrows. The burrows for rock squirrels tend to be shallow (3-5 feet) and consist of the burrow and living chamber. Following are some pictures of the burrows and a rock squirrel. Rock squirrels are active during the winter, although they can “sleep” for extended periods during cold or inclement weather.
