What are prolegs?

Prolegs are unjointed, fleshy appendages found on the abdomen of certain larvae, particularly in caterpillars (the larval stage of moths and butterflies). Unlike true legs, which are jointed and found on the thorax, prolegs help these larvae grip surfaces and navigate their environment. They typically have small hooks or crochets that aid in clinging to plants or other substrates. Prolegs play a crucial role in the mobility and feeding behavior of these developing insects.