Do caterpillars have legs, and how many do they have?

Expert Answer

Yes. A caterpillar is the larval stage of a butterfly or moth, and it has 6 true legs at the front of the body, plus additional false legs used for gripping and moving. That is why people often think it has more than 6 legs at first glance.

The 6 true legs are the articulated thoracic legs, just like other insects. Behind them, most caterpillars also have prolegs on the abdomen; these are not true legs and are not jointed. They help the caterpillar cling to leaves and stems, climb, and stabilize its body while it moves.

If you are trying to identify a caterpillar, the key point is to separate true legs from prolegs. True legs are near the head and are smaller and jointed. Prolegs are softer, more numerous, and usually end in tiny hooks or pads. The exact number of prolegs varies by species.

If you meant a butterfly or moth rather than the larva, the adult insect also has 6 legs. The “more than 6 legs” idea comes from counting both true legs and prolegs together. For plant damage or pest identification, the shape, color, hairiness, and the number of prolegs are often more useful than leg count alone.

Answered by VANROCK specialists · Published 9/22/2026