Contact: Tilo Arnhold
Helmholtz Association of German Research Centres
Caption: Lycaena helle (Violet Copper) are declining rapidly across Europe where it breeds in damp meadows where its food plants, Polygonum species (Bistort), are abundant. It needs very light grazing, avoiding the summer breeding period from April to August.
Credit: Chris van Swaay
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Related news release: How to save Europe's most threatened butterflies