Some trees have increased fivefold in height in just six years

The height of some trees quintupled in just six years.As forests returned, so did songbirds.Beavers, which eat trees, multiplied in the rivers,
and their dams provided homes for otters, muskrats, ducks, frogs and fish.The wolves killed coyotes, allowing rabbits and mice to increase,
providing more food for hawks, weasels,foxes and badgers.Bald eagles and ravens fed on the carrion that the wolves abandoned.So did bears,