The "right" ones? Back 15,000 years ago there were no wolves in a lot of WA as glaciers covered a lot of the state. And even more of BC. As conditions change, animals move; plants too.

If you hold the standard of Genetic Purity for wolves and grizzlies then why not elk and fish? Lots of elk were moved around in the 20s and 30s to replenish overhunted herds. Most game from Yellowstone, where they had "too many". There have been thread upon thread here about the spread of hatchery fish genes. If a fish can't trace it's ancestry directly and purely back to the "original" wild fish, should we remove them?