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JOSH EDELSON / AFP / Getty The thousand or so wolves that live in Wisconsin may inadvertently be doing a service to humanity, saving the lives of dozens of people. On average, 19,757 Wisconsinites collide with deer every year, leading to about 477 injuries and eight deaths. But according to Jennifer Raynor, a natural-resource economist at Wesleyan University, more would do so if wolves weren’t around. “Some lives are saved, some injuries are prevented, and a huge amount of damage and time are saved by having wolves present,” she told me. These predators tend to prowl alonghuman-made corridors such as trails and roads. By killing deer near these areas, or simply intimidating them into staying away, wolves could keep the animals far from cars. By analyzing 22 years of data, Raynor and her colleagues found that Wisconsin’s wolves have reduced the frequency of deer-vehicle collisions by a quarter. They save the state $10.9 million in losses every year a figure 63 times greater

United statesColorado state universityAdrian trevesIsle royaleCorbett graingerDominic parkerRebecca niemiecPeter davidMichelle nijhuisJennifer raynorMatthew kauffmanGuillaume chapronYellowstone national parkUniversity of wisconsin at madisonSwedish university of agricultural sciencesWildlife commission