PLANET EARTH Great Plains

They've been searching for days without a sign. Somewhere in this immense landscape there is food for them. This is it. Caribou. Travelling thirty miles a day they can cover nearly two thousand miles during the summer months. The wolves will starve if they don't find the caribou but it's no easy task to locate prey that never stops traveling.
Biting flies and the quest for new pasture drives the migration ever onwards. A wolf has finally picked up the trail. The caribou are close. At last, a chance. The hunt is on. The wolf panics the herd, and the weak and young are singled out. A calf is separated from its mother.



At the goose colony it's high summer and eggs are hatching. The young all emerge within a day or two. A marvel of timing. The colony is now home to a million goslings（小鹅）. The fox is still gathering all she can get. Sometimes one mouth simply isn't enough. One will have to do. Not all food is stored. Some is needed right now. She has seven hungry cubs to feed. As their appetites grow, the mother must work tirelessly to raise her family.