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Total number (n) of blood samples collected in 2019 and 2020 and sampled bird orders per sampling region A to C. Region A: northern and central-western part of Germany; region B: eastern and central-eastern part of Germany; region C: central and southern parts of Germany (ellipses). The main sample collectors (big red stars) and the minor sample collectors (small red stars) of the wild bird network are shown for each region.
