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"Photographer Joe Riis dedicated nearly two years to uncovering the rhythms of the Grand Teton pronghorn migration in western Wyoming. One of the longest land mammal migrations in North America, this herd of 300 pronghorn travel over 100 miles from the Tetons to southern Wyoming. Their migration path is now designated as the first ever 'National Migration Corridor.'"

Pronghorn Migration
By K. M. Kostyal