Case-bearing moth larva (plaster bagworm)

Humid indoor areas, sheltered walls, ceilings, porches, and outdoor surfaces where its portable case can remain attached. Common in tropical and subtropical regions.

The larva feeds mainly on spider webs, wool, hair, dead insects, and other keratin-containing debris; it generally does not eat living fabric aggressively.

It lives inside a tube-like silken case covered with lint and debris, extending its head to crawl and feed. Mature larvae attach the case to a surface, pupate inside, and emerge as small gray moths.

Usually harmless to people and pets, with no sting or bite. It helps recycle organic debris, though larger indoor populations may damage woolens, furs, feathers, or stored textiles.