Following the wildlife in Yellowstone National Park, highlighting the few creatures that can respond to the region's battle against the elements.
How Yellowstone National Park, which spreads over 3,500 square miles, holds within its borders dozen of ecosystems, all delicately interconnected.
How Yellowstone is home to some of the world's most specialised creatures - animals powerfully equipped with anatomies, senses and abilities to prosper.
How battles for territory ensue across the park, locking males in conflict and extraordinary displays as they protect territory and seek access to females.
Springtime sees animals earlier locked in conflict and desperation for survival, now at their most gentle, as they help their newborn young.
How life and death co-exist side by side, following the tragic death of a single young bison as its carcass feeds an entire community of animals.
