Earthworm, an Annelida

     The Earthworm is an Annelida and arguably one of the first organisms to have a complete digestive track surrounded in muscle. Another characteristic of the earthworm would be that its skin is segmented and can have up to 5 heart. But contrary to popular belief, the earthworm can not re-grow when is is cut in half. The Earthworm's scientific name is Lumbricina.

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     The earthworms fertilizes and spreads oxygen trough out the ground to help plants grow. But if the Earthworm is introduced to a forest of an ecosystem with fence environment of trees, the earth worm becomes a destructive force of nature. The earthworm's fertilization promotes small and invasive plants that create competition for the trees. This, in turn, destroys the trees. Some of these trees are homes to birds, ad when they are destroyed the birds do not have a home most likely causing them to die off.

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