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Earthworms are vital contributors to healthy soil, working tirelessly below the surface to aerate and enrich the ground. Their constant movement helps break down organic matter, turning leaves and debris into nutrient-rich compost that supports plant growth.
When it rains, earthworms often emerge from their underground tunnels. Heavy rainfall floods their burrows, reducing oxygen levels and forcing them to the surface where air is more readily available. This behavior is a survival instinct to avoid suffocation.
On wet ground, earthworms move easily across the surface and may travel further distances in search of new habitats. The moisture allows their skin to stay damp, which is essential for breathing since they absorb oxygen through their skin.
While above ground, earthworms are more vulnerable to predators and sunlight, so they typically return underground as soon as conditions improve. Their rainy day journeys play an important role in soil health, helping to mix nutrients and support ecosystems above and below the ground.
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