Animals fight to stay alive; a grizzly bear's robbery gone wrong; a starling defends her home.

Animals fight the elements and each other for survival; golden eagles fight for food in Siberia; markhor goats fight in the mountains of Pakistan.

Life in the tropics; fatal violence when a tiger is hungry for territory; monster-sized lizards fight.

Animals fight to survive at extreme altitudes; a bald eagle in aerial combat; coyote pack fights.

A badger's attempt to feed her children goes wrong; a hippo defends his family to the death; a fight between wild turkey.

Animals witnessed turning on their own kind.