Kangaroo rats are another example of animals that are 'perfectly fit' for their environment. These rodents have adapted and learned to survive in the desert without drinking ANY water.
This wood frog lives is one of the only animals that can live in the Arctic circle. These amphibians bury themselves and go into hibernation when the temperature gets cold. Then they stop their heart, (so they stop breathing) and 65% of the water in their body turns into ice. After 2-3 months of this hibernation they 'defrost' themselves and go back to normal.
These Antarctic fish have special antifreeze proteins in their blood which prevent them from freezing to death in the cold water. These proteins bind together and create tiny crystals that help the fish not to freeze. This is another example of an animal that's perfectly fit for its environment.
Their bodies have evolved and allowed them to get all the moisture they need from seeds. This helps them to survive in the desert because the lack of water doesn't affect them. In addition, they have remarkable hearing and can jump up to 9 feet, both of these characteristics protect them from predators.
To stay out of this extremely hot climate the bullfrogs bury themselves 6-8 inches underground and create a mucus membrane. This membrane eventually turns into a hard cocoon that the frog can live in for up to 7 years. When it finally rains the moisture softens the cocoon and wakes up the frog.
These African Bullfrogs have a coat of mucus on their skin that helps them to breathe in the dry desert.
These cuttlefish have the ability to change the color of their skin and texture to match their surroundings. They can detect how much light is being absorbed and then change their physical appearance to blend in. These features allow cuttlefish to sneak away from predators and catch prey.
Okapi live in the Democratic Republic of Congo and have a special scent on their feet that allow them to mark their territory. In addition they have infrasonic calls that allow them to communicate with other animals without predators hearing them.