Inter-annual variation in the number of falcon territories in Dadia-Lefkimi-Soufli National Park fitting Generalised Additive Models. Population trends modelling is also demonstrated for each species with cubic regression (cr) splines used as smoothing terms. a Variation in the number of Common kestrel territories fitting a GAM b Predictive GAM for the Common kestrel with smoothed terms (cr splines) c Variation in the number of Eurasian hobby territories fitting a GAM d Predictive GAM for the Eurasian hobby with smoothed terms (cr splines) e Variation in the number of Peregrine falcon territories fitting a GAM f Predictive GAM for the Peregrine falcon with smoothed terms (cr splines).