UK butterfly populations have declined significantly due to habitat loss - conservation management creating appropriate larval and adult resources directly improves population welfare.
Butterfly welfare operates primarily at the population level - individual butterfly welfare is difficult to assess but population decline represents welfare harm to billions of individual insects across their multi-stage life cycles. Habitat management that provides larval food plants, adult nectar sources and appropriate microclimates directly supports individual fitness. Conservation management creating diverse, structurally complex habitats supports both butterfly welfare and associated biodiversity. The welfare consideration that butterflies may experience some form of welfare-relevant states - given nociceptor presence and avoidance behaviour - suggests that supporting population welfare through habitat management is valuable beyond purely ecological reasoning.