The great plains of North America have taken the name "prairie” from the French for meadow. Formed in the rain shadow cast by the nearly five-thousand kilometer length of the Rocky Mountain range, the limited rainfall on the prairie has created a unique and immense grassland ecosystem. Once covering most of North America, since European settlement the prairie has been much reduced and, in this episode, we traverse this largely unprotected environment in search of Bison, Red Foxes, Pronghorns, Bald Eagles and Wild Horses.