A couple of fishermen have discovered a small, uncharted island in the Chesapeake Bay. The animals on it are quite different from those they have seen before.

A group of scientists have been brought in to study the island. They need to "classify" these animals (note the similarities and differences in the creatures). By looking at these differences, and how each is specially adapted to the island, they can learn more about this island and what lives there.

They need your help to create an identification key of these creatures. This key will help all the scientists identify the creatures in the same way, and will simplify their data collection.