As the helicopter crests Elephant Mountain, a small army of biologists, veterinarians, and volunteers rushes over to meet it. It’s a few days before Christmas, and the sun has just risen on this group outside Elephant Mountain Wildlife Management Area's headquarters south of Alpine. All eyes are directed at three figures swaddled in neon orange and swaying gently on a rope that hangs from the approaching chopper. Poking out of each orange bundle is the head of a blindfolded sheep. Why are sheep flying in such style?