The cycle of substances in nature in which the crow participates.

Crows, like any living organisms, participate in the cycle of substances. This is the water cycle in nature, as birds drink water, excrete it and it is restored by natural features such as evaporation. But living organisms themselves do not help and do not interfere with the water cycle in nature. They are just participants in the cycle. Also, ravens consume organic and inorganic substances. They are restored thanks to various bacteria and fungi that break down organic waste and thus ensure their existence.