Yes, the wildlife in the Flathead is currently doing fine, due largely to the national parks of Waterton and Glacier that border it and that provide a refuge for wildlife.
A Flathead National Park Wilderness Reserve would expand that sanctuary and would represent B.C.'s contribution to ensuring that wildlife continue to thrive in the Flathead. Every generation since Waterton was created has said that B.C. should add the "missing piece" of the Flathead to make Waterton Park complete.