Global trends in bird species survival indicator: data sources and methods
The Data Sources and Methods report documents the methodology used to generate each of the indicators, where and how the data are collected, and their current limitations. The report also provides: data, sources and methods behind the supplementary charts; supporting context for statements in the report; and other background to facilitate interpretation and further analysis of the indicators.
The Data Sources and Methods report is also available in PDF (366 KB).
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