Why don't frogs croak by the river?

Frogs don't bark by the river for many reasons. First of all, the weather change may affect the frog's singing. For example, sudden hot and cold weather may cause frogs to sing less or disappear. Secondly, the change of water source may also affect the living environment of frogs. For example, the decrease or dryness of the water source in the lotus pond may lead to the decrease or disappearance of frog croaking. In addition, if the ecological balance of the lotus pond is broken, for example, due to pollution or other human activities, it may affect the living environment and reproductive behavior of frogs, leading to the reduction or disappearance of frog croaking. Finally, if frogs are threatened by diseases or natural enemies, their health and singing behavior may be affected.