Tree Frog Evolution

The after frog image has evolved that the frog has a darker skin as well as having a more rubberized skin to prevent water loss. In the future, water could be rare to find due to global warming and freshwater pollution. At the present day, frogs need fresh water to moisten their skin but if the water is either polluted or not available, the frogs need to evolve to intake water through their mouths instead of their skin.