Bagworm

The bagworm family is fairly small, with about 600 species described. Bagworm species are found globally, with some, such as the Snailcase Bagworm (Apterona helicoidella), settling continents where they are not native in modern times.

Most bagworms are inoffensive to humans and not at all conspicuous; some are occasional nuisance pests.

Witnessing spraying of Bacillus thuringiensis to  bagworm attacking palm oil estate in Chaah , Johor on 19Jan2012