Mass planting of marsh violets key to saving rare UK butterfly, says National Trust

Trust aims to boost small pearl-bordered fritillary colonies in Shropshire Hills by planting 20,000 violets this year for their caterpillars

A mass planting of marsh violets across England's Shropshire Hills is to take place to try to prevent further decline of the small pearl-bordered fritillary or Boloria selene, a rare UK butterfly.

The small pearl-bordered fritillary's distribution across the UK has plunged 71% since the mid 1970s and the species is now listed as vulnerable, according to the 2022 state of UK butterflies report.