Aspects of this topic are discussed in the following places at Britannica.
One species, the hag moth (Phobetron pithecium), derives its name from the larva’s fleshy appendages, which are covered with brown stinging hairs resembling disheveled or tousled hair. When the caterpillar spins its cocoon the appendages are transferred to the outside of the cocoon, where they serve for protection and camouflage.
We welcome your comments. Any revisions or updates suggested for this article will be reviewed by our editorial staff. Contact us here.
Regular users of Britannica may notice that this comments feature is less robust than in the past. This is only temporary, while we make the transition to a dramatically new and richer site. The functionality of the system will be restored soon.