On the Movie: Pronghorn Migrations across Seasons

"On the Move," an interactive storymap, follows a year in the life of a pronghorn doe living on the northern edge of the species range. To return to seasonal ranges—to reproduce, successfully rear her young and to survive—she must move deliberately across vast distances, often hundreds of miles, each year. That migration relies on a long swath of open and connected habitat. But today, changes on the land are imperiling these ancient migrations.