One wow, sunny, two wow, rain, three wow, four wow, what kind of bird is heavy rain?

Egrets are beneficial birds. They feed on rivers and ponds in the fields and specialize in all kinds of insects, small fish and shrimp. They are the protectors of crops. Egret is a weatherman. Every day at dusk and dawn, egrets fly around this place, making "wow" and "wow" calls. If it is sunny, an egret will come out to call, if it rains, two egrets will come out to call. If more than three egrets call out, there will be heavy rain or flood. Therefore, there is a proverb in my hometown: "One wow is sunny, two wow is rainy, three wow is four wow is big (water).

Egret (English name: Egret): Egret is a * * bird 13 species, among which there are four species: Great Egret, Middle Egret, Little Egret and Yellow-billed Egret, all with white feathers, commonly known as "Egret".