Rainforests

22 Pages 5577 Words

evolved with a tough shell to protect them
from predators. In turn toucans and parrots developed large, strong beaks,
which serves as a nutcracker and provides them with many tasty meals.

Many animal species have developed relationships with each other that benefit
both species. Birds and mammal species love to eat the tasty fruits provided
by trees. Even fish living in the Amazon River rely on the fruits dropped from
forest trees. In turn, the fruit trees depend upon these animals to eat their
fruit, which helps them to spread their seeds to far - off parts of the forest.

In some cases both species are so dependent upon each other that if one becomes
extinct, the other will as well. This nearly happened with trees that relied
on the now extinct dodo birds. They once roamed Mauritius, a tropical island
located in the Indian Ocean. They became extinct during the late 19th century
when humans overhunted them. The calvaria tree stopped sprouting seeds soon
after. Scientists finally concluded that, for the seeds of the cal...