Caterpillar of Demonarosa rufotessellata (Moore, 1879) – Sarawak / Borneo – around 1050m ASL

The caterpillar of Demonarosa rufotessellata (Limacodidae) is a non-stinging slug moth larva with a strikingly unusual form. Unlike typical caterpillars, it lacks visible legs or a defined head and tail, appearing instead as a peaked, angular, green mass with smooth armor-like markings across its surface. Its locomotion is slow and slug-like, relying on a muscular adhesive underside.

Larvae are commonly found on tropical and subtropical host plants, including oaks (Quercus spp.), lychee (Litchi chinensis), and Ligustrum species. They feed by consuming entire leaves before moving on, and pupate inside a hardened, ball-like cocoon usually secured between two leaves. In temperate regions, the species overwinters as pupae.

Large populations may occur, but the larvae are frequently attacked by braconid parasitoid wasps, which “mummify” them into protective shells as part of the wasps’ life cycle. The adult moth is colorful and fluffy, easily recognizable, and has a wingspan of about 25 mm.