Grassland butterflies have declined dramatically across the UK and Europe due to habitat loss. Their welfare and conservation needs are increasingly understood through research on invertebrate sentience and ecology.
Grassland butterfly welfare operates at two levels: individual welfare in terms of disease, parasitism, and resource stress; and population-level welfare through habitat availability and climate suitability. Habitat fragmentation isolates populations, creating inbreeding stress and local extinction risk. Individual butterflies face thermal stress if microclimatic refugia are absent from degraded habitats. Conservation grazing management that creates structural diversity in grasslands simultaneously improves habitat quality and reduces population-level welfare stresses. Supporting grassland conservation is an effective intervention for butterfly welfare.