Head Banging Bighorn Sheep of the Rockies

The Kingdoms of the Sky Andes crew document how they became the first ever to film the white-winged Diuca finch -- the only bird known to build its nest inside glaciers.

The Himalaya crew show how they managed to keep pace with high altitude marathon runner Mira Rai.

The Rockies crew tell how they stumbled on the great story of a mountain lion was stashing her kills in a creepy, deserted ranch.