Why do frightened crows bark?

"The rise of stinging insects" is a phenological phenomenon. Underground pests, which have been rampant for a year, get into the soil and hide in autumn and winter, and enter a state of dormancy and hibernation. When the temperature rises, the weather gets warmer and there is a thunderstorm in the air, they wake up from a deep sleep.

Crow singing is also a phenological phenomenon. Crows are dumb birds in winter. This bird is very sensitive to climate change. They live in the Woods in winter and don't eat. When someone is disturbed, they just fly in tandem, but they don't sing, and they are in a semi-dormant state. After the sting, the earth revived and they began to sing. Therefore, in the twenty-four solar terms, there is a ballad of "crows crying in surprise".

The reason why crows bark after being scared is because the scared season is in a critical period of alternating cold and warm, the ice and snow on the earth melt, the grain scattered in the farmland and the weed seeds in the wilderness are exposed on the ground during the autumn harvest, and the small insects and animals that have been dormant for a winter have begun to come out to move.

In this way, crows have a food source, so at this time they sing to each other, send messages, fly to the fields in droves for food, and start to nest, lay eggs, hatch and reproduce in trees. The newly hatched birds need insects to feed them, and it is difficult for them to grow without insects.

There is such a riddle circulating in the countryside. The riddle is "green stalks, pick a big bowl, dry rain, dissatisfaction." The answer is this bird's nest, which people used to call "the nest for the elderly".