These fishes hatch from eggs in the cold mountain streams and eat tiny water organisms and insects that fall into the water. The young fish swim down the river to the ocean, where they grow to maturity. When they are fully grown, the large fishes return from the ocean and swim upstream to lay their eggs. Then the parents die, and their bodies provide food for all the meat eaters in the area. Secondary Consumers are also at home on the forest floor .
Tiny shrews devour the insects, and frogs catch insects as they fly by.
There are many insect-eating birds as well, some of which, like the woodpecker, are adapted to finding insects in the trees. Weasels eat small animals, and racoons eat animals, fishes, frogs, and fruit. Owls eat voles and chipmunks. Insects live as parasites on other animals. Large secondary consumers, such as wolves, bears, and cougars, are the only ones who can bring down deer or elk.