Breathtaking Metamorphosis: The Saturniidae Moths..

Most are solitary feeders, but some are gregarious. The Hemileucinae are gregarious when young and have stinging hairs,[2] those of Lonomia containing a poison which may kill a human. Arsenura armida is another well-known example, and are infamous for their large conspicuous masses during the day. Their coloration is not cryptic, instead exhibiting aposematism.