Figure 2

Population trend for Greater Scaup Aythya marila wintering in North-West Europe in years 1988–2018, showing a moderate decline, λ = 0.9811 ± 0.0098 95% CI (P < 0.001). Grey line—imputed values, black dotted line 95% confidence intervals, grey thick line—modelled trend, black thin lines—95% confidence intervals.