Small bird, big message - New study confirms common birds are powerful indicators of threats from climate change. From Europe to the US the trends match as scientists expected, the data showing coherent and substantial changes in detriment to cold-adapted species.

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Small bird, big message - New study confirms common birds are powerful indicators of threats from climate change. From Europe to the US the trends match as scientists expected, the data showing coherent and substantial changes in detriment to cold-adapted species.