WYOMING—It was a blistering 7 below zero this morning at Yellowstone National Park, but that didn’t seem to faze Buffalo Guy Jake Angeli, who was grazing on the vegetation. FBI agents were made aware earlier this week that Yellowstone is Angeli’s natural habitat, so they arrived on the scene this morning with a warrant for his arrest and their weapons drawn. “HOLD IT RIGHT THERE!” shouted FBI agent Patrick Henderson as Angeli’s head emerged from the tall grass. “HANDS ON YOUR HEAD!” “You talking to me?” asked the Buffalo Guy with his mouth full. “Because these are clearly hooves, not...