Table - link % change since 1970
||Rosenberg KV et al., Decline of the North American avifauna, Science 19 Sep 2019:
eaaw1313 DOI: 10.1126/science.aaw1313 figure 1
||Abstract: "Using multiple and independent monitoring networks, [investigators] report population losses across much of the North American avifauna over 48 years, including once common species and from most biomes." Caption to figure 1A: "...integrating population size estimates and trajectories for 529 species..." See note beneath figure
||P.1 right column 2nd paragraph: "Results from long-term surveys, accounting for both increasing and declining species, reveal a net loss in total abundance of 2.9 billion (95% CI = 2.7-3.1 billion) birds across almost all biomes, a reduction of 29% (95% CI = 27-30%) since 1970 (Fig. 1 and Table 1)." P.2 left column top paragraph: "Across breeding biomes, grassland birds showed the largest magnitude of total population loss since 1970—more than 700 million breeding individuals across 31 species— and the largest proportional loss (53%): 74% of grassland species are declining. (Fig. 1 and Table 1)."
||Ron Milo - Admin