Swallows born in the bird's nest at home suddenly died in cold weather.

If the temperature is too low, newly hatched swallows will freeze to death. Swallows are migratory birds and are afraid of cold.

The temperature is too low, maybe Xiaoyan can't bear it. After all, geese are going to catch food. Usually, if you put it on, it will fall again. There are all kinds of possibilities, and some of them climbed out by themselves.