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This paper on bird population declines is a real smoking gun in #biodiversity declines

"Agricultural intensification, in particular pesticides and fertiliser use, is the main pressure for most bird population declines, especially for invertebrate feeders."
We should be grateful to the thousands of volunteers who compiled the dataset: a "population time-series of 170 common bird species, monitored at more than 20,000 sites in 28 European countries over 37 years"
#birds
https://www.pnas.org/doi/10.1073/pnas.2216573120