過去のイエローストーンにいたオオカミ http://yellowstoneinsider.com/2009/05/03/wolves-in-yellowstone-a-short-history/ >They were gray wolves of the sub-species canis lupus irremotus, the Rocky Mountain gray wolf.
再導入オオカミ http://www.californiawolfcenter.org/learn/wolf-recovery-today/ >Northern Rockies >Population Source: In the 1980’s, wolves from Canada dispersed into northwestern Montana and formed breeding pairs. In 1995 and >1996, 66 wild wolves were translocated from Canada to central Idaho and Yellowstone National Park. >Subspecies: Canis lupus occidentalis