Monarch butterfly populations have declined by over 90% in recent decades. Habitat restoration, particularly milkweed planting, is among the most accessible conservation actions available to individuals.
Whether insects experience welfare in a morally significant sense is actively debated, but the scale of monarch decline — hundreds of millions of animals lost from a single migratory population — makes conservation attention warranted regardless. The welfare framing highlights that individual monarchs experience their life cycle and that threats affect billions of individual organisms. Milkweed loss eliminates breeding habitat, preventing successful reproduction and potentially stranding females who cannot find oviposition sites.