Map of the Greylag Goose populations compared in the present study. Populations 1‒6 are referred in the literature (Pellegrino et al. 2015). 1: Finnmark, 2: Vega, 3: Nord, 4: Oise, 5: Gironde, 6: Landes, 7: Prespa Lakes. Dark and light shaded areas represent the breeding and staging/wintering distribution of the Greylag Goose respectively.