What specific US mountain regions house the fragmented wolverine 'sky islands' today?
Answer
Rocky Mountain regions
In the contiguous United States, the wolverine population exists in isolated pockets described metaphorically as 'sky islands' due to their required high-altitude conditions. Current population concentration is overwhelmingly situated in the Rocky Mountain regions, specifically identified through map data to include areas within Idaho, Montana, and Wyoming. Furthermore, populations extend into the Cascade Range in Washington state, all sharing the common characteristic of high elevation needed for persistent snow cover.
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