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Casey tracks a male grizzly bear that is making his first forays into the Yellowstone spring after a winter hibernation.

Casey's Wild Backyard

Grizzly

Casey follows one of the bison herds that is making a comeback in Yellowstone.

Bison

Casey finds a nest of wintering rattlesnakes and explains how they survive in the harsh land of the Wyoming prairie.

Snakes

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

Mountain Lion

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Wildlife expert-photographer Casey Anderson introduces amazing wildlife in Yellowstone.

S1 E4 | Grizzly

E4 | Grizzly

E3 | Bison

E2 | Snakes

E1 | Mountain Lion