It’s been called The Big Empty – an immense sea of sagebrush that once stretched 500,000 square miles across North America, exasperating thousands of westward-bound travelers as an endless place through which they had to pass to reach their destinations. Yet it’s far from empty, as those who look closely will discover. In this ecosystem anchored by the sage, eagles and antelope, badgers and lizards, rabbits, wrens, owls, prairie dogs, songbirds, hawks and migrating birds of all description make their homes. The Sagebrush Sea tracks the Greater Sage-Grouse and other wildlife through the seasons as they struggle to survive in this rugged and changing landscape. In early spring, male sage grouse move to open spaces, gathering in clearings known as leks to establish mating rights.