In the larval stage, bagworms extend their head and thorax from their mobile case to devour the leaves of host plants, often leading to the death of their hosts. Trees infested with bagworms exhibit increasingly damaged foliage as the infestation increases until the leaves are stripped bare. Some bagworms are specialized in their host plants (monophagous), while others can feed on a variety of plant species (polyphagous). A few species also consume small arthropods (such as the camphor scale "Pseudaonidia duplex", a scale insect). One bagworm species was found to eat an orb-web of "Plebs sachalinensis" (Araneae, Araneidae) entirely.