Egg The rosy underwing begins as an egg, often oviposited on plant matter. The eggs are small, rounded, and may have a protective coating. Color varies, typically matching the substrate to avoid predation. This stage is focused on embryonic development within the egg.
Larva Upon hatching, the larva of rosy underwing emerges, characterized by its cylindrical body and chewing mouthparts for feeding voraciously, usually on plant leaves. It grows rapidly, molting several times, and its coloration often matches its environment for camouflage.
Pupal After reaching a threshold size, the larva transitions to a pupal stage. Within the protective chrysalis, the rosy underwing undergoes significant transformation: body structure, function, and size change drastically, preparing it for adult life.
Adult Emerging from the pupa, the adult rosy underwing's development is marked by the presence of wings and functional reproductive organs. The body is fully formed and hardened, and the adult is mobile, focusing on reproduction and, in some species, feeding on nectar.