From Sierraclub.org:

In 1987, a farmer near the town of Pouce Coupe, British Columbia, saw four gray wolves on his property and shot one of them. The wolf happened to be radio-collared, and the farmer reported the collar to authorities. The data revealed that the five-year-old female wolf had traveled all the way from Montana’s Glacier National Park—a distance of some 540 miles. This wolf, which was among the first litter of radio-collared wild-born wolves in the western United States, had loped through protected national parks and private ranches, crossed interstate highways, dodged traffic, and, along the way, avoided the rifle crosshairs of ranchers—until it met the last one.

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