California Ground Squirrel or Douglas' Ground Squirrel

I’m curious about the differences between Otospermophilus beecheyi ssp. douglasii and Otospermophilus beecheyi. I tried searching the internet to figure out the difference, but I’m stumped.

Thanks for enlightening me.

This came up when I scrolling through dunes observations and saw this one: https://www.inaturalist.org/observations/218697364

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O. b. douglasii is a subspecies of O. beecheyi, so are you asking for the difference between O. b. douglasii and other subspecies (such as the nominate subspecies O. b. beecheyi)?

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Douglasi is recognized as full species by some though iNat doesn’t. So it’s useful to include the subspecies because at some point the subspecies will be elevated to a full species on iNat.

Can’t say how to distinguish them except by location.

Edit: I checked the Mammal Diversity Database as I’m not familiar with either of these squirrels and they do separate them into two species:
https://www.mammaldiversity.org/explore.html

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Thank you. If I’m in Oregon (specifically on the central Oregon coast) and I see a California Ground Squirrel, how do I know which one I’m seeing (California or Douglas’)? I guess that is my question. Are only Douglas’ found in this region of Oregon or are both found in Oregon? If this is a ridiculous question, forgive me. I’m not a scientist and do not have a scientific background (truly a citizen non-scientist…LOL).

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Thanks. You may have answered my question, but not sure. I’m wondering if the subspecies is location dependent. I’m just trying to figure out how to know what I’m seeing here along the Oregon coast (California or Douglas’).

This is the range map for douglasii based on information in the Helgen et al. 2009 paper in Journal of Mammalogy that revised a bunch of the ground squirrels.

https://www.researchgate.net/publication/375521118_Otospermophilus_douglasii_Rodentia_Sciuridae

To my knowledge, all of your Otospermophilus in Oregon would be douglasii.

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I see there are curation flags on the California Ground Squirrel species page to change this taxonomy to elevate Douglas’ to full species.

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Thank you. That answers my question (which I see was unclear on the first message). I appreciate your help.

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How lucky I feel that you asked this. I just happened to upload an old record today, and had the same confusion:

https://www.inaturalist.org/observations/225614210

Thanks for seeking clarification!

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the identify page is sorted by most recently uploaded by default, so it went to the top of the list!