Phenological phenomena contained in bird songs

Bird song can reflect the change of weather! When you are enjoying the beautiful birds singing, you can get the future weather forecast! The proverb says, "Birds die and crow in the rainy morning, which indicates that it will clear up in the morning after continuous rainy days." . This is a summary of the observation results of natural phenology for hundreds of years. For example, in the book "Tian Wu Jia Xing" compiled by Lou Yuanli at the end of Yuan Dynasty, there are many proverbs to judge the weather change by bird singing. Such as "the cuckoo crows at midnight, and the mud will dry up tomorrow", "it will clear up soon after a long rain" and so on. In the bird kingdom, the most common sparrow is the famous "sunny and rainy bird", which is very sensitive to the change of weather.