They (wolves and grizzlies) were there first. Probably important for keeping other critters. (Not us). In check.
Humans probably introduced C. lupus after the Pleistocene when they brought bison over the Bering Land Bridge to the North American continent.
50 posted on 12/16/2013 8:52:15 AM PST by Carry_Okie
(0-Care IS Medicaid; they'll pull a sheet over your head and take everything you own to pay for it.)