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Common Earthworm zoo icon

The common earthworm (Lumbricus terrestris) is an abundant species, which has an important role in the aeration and fertilization of soil. It is the largest British earthworm and has a reddish-brown back, a yellowish underside and an often-prominent orange red 'saddle' region known as the 'clitellum', close to the reproductive organs. Although this earthworm has a cylindrical body, the tail region may become flattened. The body is segmented and has visible rings known as ‘annuli’; each segment bears small hairs known as 'chaetae', which help the worm to move through the soil.

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