Mule deer in Hoback Basin, Bridger-Teton National Forest, Wyoming

These mule deer on summer range in the Hoback Basin make one of the longest-distance migrations ever documented, some 150 miles across the Green River Basin, stretching from their Red Desert winter range in the south to the Hoback in the north. The mule deer "surf the green wave" of forage emerging in spring at the edge of melting snow. Credit: (Gregory Nickerson, Wyoming Migration Initiative/University of Wyoming)