WHY do worms crawl out after it rains?

Roughly 50 years ago, biologists believed that earthworms crawl to the surface after it rains to avoid drowning in their own burrows. However, this theory was rejected as they breathe through their skin, and a wet environment is ideal. There are several hypotheses at this point:

➡️For easy migration: it is easier for them to travel distances by crawling on a wet surface than by creating passages in the soil.

➡️ Escape from the enemy: raindrops hitting the ground are like vibrations from the movement of predators such as moles.

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