Why do Winter Moth larvae exhibit the characteristic "looping" gait described as "looper" movement?
Answer
They possess only two pairs of rear prolegs, forcing body contraction for forward movement
The defining characteristic of the larval stage, earning them names like 'looper' or 'inchworm,' is directly linked to their leg structure. Specifically, these caterpillars possess only two pairs of prolegs located toward the rear of their body. Because of this limited number of grasping appendages at the rear, when they move, they cannot crawl in a straight line like many other caterpillars. Instead, they must contract their body into a loop, bringing the rear appendages forward to meet the front legs, thus creating the distinctive looping motion necessary for locomotion.
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