Fig. 2
From: Positive association between forest management, environmental change, and forest bird abundance
Decadal trends in populations of forest bird species over Europe. a: Averages of selected groups of bird species across Germany (Bundesamt für Naturschutz 2015) and Europe (European Commission 2015; San-Miguel-Ayanz et al. 2016; Schulze 2017); b: continentally-migratory forest birds; c: regionally-migratory forest birds; and d: non-migratory forest birds following PECBMS European bird observations (Schulze 2017; European Bird Census Council 2018). For species list and key, see methods Table 1