Trends in birds and butterfly populations in EU-25 (% decline)
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European data set
Additional information
The bird trends reflect the period 1980-2002. The butterfly trends reflect the period 1972/73-1997/98. The names of the bird species taken into account are listed in the methodology for calculating the core set indicator on Species Diversity (CSI009).
Related content
Used in the following publications
- The European environment - State and outlook 2005
- Progress towards halting the loss of biodiversity by 2010

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