What does the frog do to predict rain?

In the animal kingdom, frogs are called "living barometers" due to the characteristics of their skin. When the air is dry, skin moisture evaporates faster, and the frog must stay in the water to keep its skin moist; in humid and rainy seasons, skin moisture is not easy to evaporate, so it jumps out of the water. Therefore, frogs have become a "living barometer" for African indigenous people to observe weather changes. As long as the locals see tree frogs climbing from the water to the trees, they will take action to prevent rain.