Lycaena helle (Violet Copper) are declining rapidly across Europe where it breeds in damp meadows where its food plants, Polygonum species (Bistort), are abundant. New guidelines on how to save some of Europe's most threatened butterfly species have been published by a team of scientists co-ordinated by Butterfly Conservation Europe. The report covers 29 threatened species listed on the EU Habitats Directive. Each Member State has a responsibility to conserve these species. The new report will provide crucial information on how to achieve this goal and meet their international biodiversity targets.