Why do birds fly low all day today, and some even go to the ground to "feed"

When the air humidity is too high, small insects can't fly high, so birds naturally fly low for food. There is an old saying: sparrows and swallows fly high in sunny days and low in heavy rain. If the air humidity is high, it is likely to rain.

There has been a lot of rain this year, and the air humidity has been high, even on sunny days. For example, today, Dalian is sunny and dazzling. The temperature is 29 degrees, but the air humidity reaches 90%.