Casey Anderson, wildlife photographer, encounters a mountain lioness on his ranch and discovers she has several young mouths to feed.

Casey Anderson, wildlife photographer, finds a nest of wintering rattlesnakes and we learn how they survive in the harsh land of the Wyoming prairie.

Casey Anderson, wildlife behavior expert and photographer, takes us up close to the magnificent bison. We walk the bison trail with one of the herds that is making a comeback in Yellowstone.

Casey Anderson, wildlife behavior expert and photographer, tracks a male grizzly bear who is making his first forays into the Yellowstone Spring after a Winter hibernation.