The pearl-bordered fritillary has declined 97% in the UK since 1970 — one of the steepest falls of any butterfly. Its welfare depends on traditional coppice woodland management creating the warm, violet-rich ground flora it requires.
Pearl-bordered fritillary welfare is in crisis due to the near-complete abandonment of traditional woodland coppicing. The butterfly requires a very specific habitat succession: within 2-4 years of coppice cutting, violets and bracken establish in warm, sheltered clearings providing both larval foodplant and basking sites. Without new coppice cuts, the habitat closes over within 6-8 years and butterflies abandon the site. Maintaining a rolling programme of coppice cuts that creates fresh habitat every 2-3 years is the only management that sustains populations. Long-term conservation at key sites (Dartmoor, Exmoor, Argyll) demonstrates that targeted coppice management with monitored outcomes can halt and reverse decline.