How to understand the weather through natural things?

Animals have always been more sensitive to astronomical phenomena than people. "

Swallows fly low, and rain comes. "High accuracy, there is no difference since ancient times. Besides animals, plants can also forecast the weather. For example, Qinggang Tree, also known as Cyclobalanopsis glauca, is common in the south of China. Because its leaves change with the weather, it is called "meteorological tree". Cyclobalanopsis glauca leaves will change color due to the change of the ratio of chlorophyll and anthocyanin contained in the leaves. After a long drought, just before the rain, chlorophyll synthesis was blocked in hot and muggy days, which made anthocyanins dominant in leaves and the leaves gradually turned red. Some places know that when the leaves turn red, it will rain heavily in this area for a day or two, and after the rain clears, the leaves will turn dark green.

Coincidentally, in Xishuangbanna, Yunnan, there is a flower that can forecast wind and rain, and its scientific name is red calamus lotus. Whenever the wind and rain come, it will be full of vitality and in bud; When the storm comes, it will open quickly, and it is still graceful despite the storm; After the storm, the color is gorgeous, and the bonus is like the sunset, reflecting the mountain cliffs. The local Dai people call it a flower that blooms in the face of ups and downs, and the Dai language calls it "the exotic flower of waxy butterflies".