| Taxonomic Key The length of my earthworm, when it is fully stretched out, is ... You can use a ruler to measure the maximum length of your worm, or you can use the Size Diagram found at the bottom of the General Earthworm Diagram. Remember to allow your earthworm to freely extend himself as though he were crawling. Do NOT try to stretch out your earthworm because this could seriously harm the worm. Select one of the following.
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Size Diagram
