Figure 2 from: Devos K, T'jollyn F, Desmet P, Piesschaert F, Brosens D (2020) Watervogels – Wintering waterbirds in Flanders, Belgium. ZooKeys 915: 127-135. https://doi.org/10.3897/zookeys.915.38265 - Devos, Koen (2020)