Island Rescue (10).

A theory exists that animals evolve to fit their environments...

Creatures that live in snowy areas evolve to have thick fur to protect them from the biting cold.

Creatures that live deep in the oceans possess strange bodies that allow them to bear incredible amounts pf pressure and strain without trouble.

Creatures that live in jungles where there are predators left and right evolve to possess a natural camouflage.

Every living being in the world evolves over time. The magic of life. It's arcane nature to thrive even in the most extreme of places and climates.

However...

If an external stimuli is introduced, then things change, really fast.

Throves of creatures die out, and the ones that don't either follow suit after some time, or they adapt.

Adaptation is the seed of life. And magic... magic is the means, the ability to tamper with this base characteristic.