If this strikes anyone as odd, or at least mildly puzzling given that wolves have proven themselves perfectly capable of self-reintroduction in states like Washington, Oregon and, most recently, California, fear not, for you are in good company.
One obvious question here is how wolves have recolonized Washington, Oregon and far-northern California from Idaho, Montana and Wyoming, while seemingly somehow shunning Utah and Colorado. The answer is, of-course, related to geography and climate as well as human-made obstacles. While there are vast swathes of both Utah and Colorado that are more than capable of supporting healthy wolf populations, they are cut off from the Northern Rockies and Pacific Northwest by a combination of man-made and natural obstacles that together have thus far stymied the efforts of all but a few wandering wolves, none of whom have established a pack.
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