The updated EU Butterfly Indicator for Grassland species, 1990-2020. We produced a technical report to describe the indicator, it represents a major update on previous versions, through the incorporation of more and expanded datasets, together with new analysis techniques. The Grassland Butterfly Indicator is the combined population trend of 17 selected grassland species monitored across Europe for a long period of time. The indicator has been calculated from population trends estimated for the whole European region and restricted to the 27 EU Member States. In the last ten years, the indicator shows a linear decline of 32% in the EU27 and 36% in Europe up to 2020 with the last update of the eBMS database.
This would not have been possible without the effort of all the collaborators, national schemes and volunteers that provide the data to eBMS database. Our appreciation to all of them.
The EU Grassland Butterfly Species Indicator is part of the monitoring report on progress towards the SDGs in an EU context — 2019 edition, which can be accessed here. The grassland butterfly indicator contributes to Goal 15: Life on Land.