Have you ever encountered a situation in which someone who noticed birds in the sky said that it would soon rain? Such a saying, refers to the phenomenon when a lot of swallows suddenly appear in the sky, circling quite close to the ground. This is due to the fact that just before it rains, the humidity in the air rises and thus more insects fly, which the swallows feed on. Color the picture where the swallow is flying closer to the ground.
