Help on Colorado rodents ID

Colorado rodents ID


I’m looking again for help from the Mammal Watching community and this time about a trip I did to Colorado in July 2019

I’m usually quite bad at identifying rodents and since I observed quite a few different ones during this trip I was hopping someone could help me with the confirmation or identification of some species, particularly chipmumks, we observed in the Rocky Mountain NP and Mount Evans.

In the pdf document with pictures that I’m joining to my post, I think the first 4 rodents are properly identified. For Rodent #5, I think this is a black tailed prairie dogs that we observed in Boulder but since I don’t see the black tip on the tail, I have some doubts. Regarding the chipmunk (rodents #6 to 9) that are all different individuals seen in different places, I have hard time to conclude between Uinta, Colorado or least chipmunk. For the last rodent #10, I have no idea: I would assume a vole but which species? What I can say is that it was small, very shy and observed at very high elevation almost at the summit of Mount Evans.

Thanks in advance for your help



  1. Jon Hall 3 years ago

    I will leave the chipmunks to others braver than me. But the last species is a Pika. (Ochotona princeps)

    • Samuel 3 years ago

      Thanks Jon but are you sure because we saw several American pikas during that trip and they were all significantly larger and more grey than this one

      • Jon Hall 3 years ago

        Pretty sure unless it was mouse size tiny in which case I have no idea… I assume it was tailless? The colour is quite variable – they are greyer in winter I think.

        • Samuel 3 years ago

          It was indeed very small and as far as I can tell, yes, I didn’t see any tail

  2. Bud Lensing 3 years ago

    Gunnison’s Prairie dog, perhaps

  3. Bud Lensing 3 years ago

    Gunnison’s Prairie dog perhaps?

    • Samuel 3 years ago

      I thought this species wasn’t present in Boulder (where we saw it), are they?

  4. Bud Lensing 3 years ago

    The range map is close and barring the color on the tail is why I suggested that.

    • Samuel 3 years ago

      Ah ok. Interesting.

  5. Bob Berghaier 3 years ago

    I have previously seen pikas. This was a photo that you took

    • Samuel 3 years ago

      Ok. There seems to be a consensus here. Maybe a juvenile considering its size? Thanks everyone

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