United States of Animals S01E07 - Cranes, Plains and Automobiles

Every March, the Platte River Valley in Nebraska is home to a colossal crane choir when thousands of sandhill cranes pull of the migration express to rest and refuel. Meanwhile, in Texas, a trail boss leads a cattle drive through town. And finally, witness a purple martin super-enthusiast who owns the world's largest purple martin apartment complex – with over 1,200 rooms!