How can we understand the weather?

There are many ways, such as TV, SMS, newspaper, Internet, etc. If you have experience, you can also watch the celestial phenomena, and sometimes you can see the reactions of other creatures, such as dragonflies and swallows flying low before heavy rain, ants moving, fish coming out of the water for air, mosquitoes swarming and so on. The old cow looked up and sniffed the sky. It was raining. The horse's mouth is facing the sky, and the rain is ahead; Earthworms are crawling on the road, and the rain is chaotic; Crickets sing and the weather is fine; Toads croak, and heavy rain is coming. Frogs are called "living barometer" in the animal kingdom. In the wet and rainy season, frogs will jump out of the water when the air is wet before it rains; When the air is dry, the frog's skin water evaporates faster, so it will stay in the water to keep its skin moist. Sparrows are very common and are very sensitive to weather changes. If the sparrow is found foraging everywhere in winter, and its mouth still contains seeds and weeds when it enters the nest, it means that it is hoarding food, and it will usually snow within 3 ~ 5 days. In summer and autumn, when the weather is sultry and the air is humid, sparrows will fly to shallow water to take a bath to dissipate heat, which indicates that it will rain in a day or two; If a large group of sparrows take a bath, it indicates that it will rain heavily. Therefore, there is a folk saying: "Birds wash away the cold, and the rain is heavy." The folk proverb also says that "spiders weave webs, and it will clear up after a long rain", because after a long rain, spiders can't weave webs to hunt. If you see spiders crawling out to make webs, it means that the weather will clear up soon.