Inchworms are terrestrial moth larvae of family Geometridae. Unlike typical caterpillars, they have functional abdominal prolegs on only their 6th and 10th abdominal segments.

As a result, they have evolved to move by lifting the rear part of their body and forming a half loop of it; lowering and anchoring their abdominal prolegs with hooks called crochets; straightening their body, thereby moving the front of it forward.

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Taxon
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