'System in flux': Scientists reveal what happened when wolves and cougars returned to Yellowstone
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'System in flux': Scientists reveal what happened when wolves and cougars returned to Yellowstone

Large carnivores are both clashing and coexisting in the western United States. Although wolves dominate cougars and steal their prey, cougars' shift from elk- to deer-heavy diets, paired with a rugged landscape for escape, might help cougars avoid violent wolf encounters.