-
After regularity killing wolves in the late 1800s, the last wolf pack in Yellowstone is killed.
-
The grey wolf is now listed and considered as an endangered species.
-
Awareness is sparked, and the process of reintroducing the grey wolf to Yellowstone begins.
-
Relocation of 31 grey wolves from western Canada to Yellowstone starts.
-
Wolves from Montana and Idaho are removed from the Endangered species list, and Wyoming wolves were delisted a year later.
-
Wolves in Wyoming are relisted.