Our friends from the East may see a resemblance to the Groundhog. There are no groundhogs in CO. Yellow bellied Marmot is woodchuck’s high alpine cousin. The other name for it is Rockchuck.
In CO marmots are found mostly in very high elevations above the tree line.
http://en.wikipedia.org/wiki/Yellow-bellied_Marmot


[PL]
Bliski kuzyn polskiego swistaka. Rowniez blizki kuzyn zwierzaka z naszego podworka w NJ.
Yellow bellied Marmot (zolto brzuchy marmot) zyje wysoko w gorach (typowo powzej granicy lasu).
Na tych wysokosciach zimy sa bardzo dlugie, hibernacja trwa kolo 8 miesiecy.