Grassland butterflies — population index (1990 = 100)

• Greece
• Poland
• Romania
• Portugal
• Spain
• United Kingdom
• Netherlands
• Belgium
• Germany
• France
• Czechia
• Italy
• Cyprus
• Estonia
• Latvia
• Lithuania
• Finland
• Hungary
• Bulgaria
• Malta
• Denmark
• Sweden
• Austria
• Luxembourg
• Ireland
• Slovakia
• Slovenia

For this graph data for grassland butterfly species from nine countries were used: Ukraine (Transcarpathia only) since 1983 (only for Erynnis tages); Pflalz region (Germany) since 1989 (only for Maculinea nausithous); The Netherlands since 1990; Flanders (Belgium) since 1991; Catalunya (Spain) since 1994; Aargau (Switzerland) since 1998; Finland since 1999; Nordrhein Westfalen (Germany) since 2001; Doubs and Dordogne (France) since 2001.