Tree snakes have variation. They live in the trees but some of them cannot blend in well. The only predators they have are mainly big birds like eagles.
4: Competition & Natural Selection
The snakes variation is their color of their skin. It is a dark brown, yellow, and red.
5: Adaptation
The snakes have now over populated. Since they are so many snakes not much food will be available.
Evolution Has Occured
Eagles were killing the snakes that they could see better. So the red and yellow snakes were being eaten more than the brown ones.
The brown snakes were more likely to survive since they would blend in better. So the brown snakes were more dominant.
Evolution has occurred in this environment. It can be a slow or fast process. But in this the eagles killed the red and yellow snakes. So the brown snakes started to evolve more and expand more as a species.
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