Larvae live in diverse habitats, include fresh and salt water, soil, decaying material and as parasites of plants and animals. The lifespan of a larva varies according to the species. The larvae of monarch butterflies have lifespans of about two weeks, while other butterfly and moth species can live as a larva for a single week to as long as six weeks, in the case of the moth Actias luna.
Orange-and-black wings fill the sky as NOVA charts one of nature’s most remarkable phenomena: the epic migration of monarch butterflies across North America. NOVA’s filmmakers followed monarchs on the wing throughout their extraordinary odyssey.
Individually, Monarch butterflies are orange and black, but when they mass for migration they fill the air with color. Their migration path covers a large part of North America and is prompted by the sensitivity of the butterflies to cold. In warmer areas the butterflies overwinter in large groups that may cover whole trees.