autumn Aerial view on the road serpentine in the national park Lovcen in Montenegro. Lovcen national park in Montenegro, Balkans, Europe. Lovcen national park in Montenegro, Balkans, Europe. Common crane, Grus grus, in Biebrza national park, Poland Common crane, Grus grus, in Biebrza national park, Poland Common crane, Grus grus, in Biebrza national park, Poland Common crane, Grus grus, in Biebrza national park, Poland Common crane, Grus grus, in Biebrza national park, Poland Durmitor national park in Montenegro, Balkans. Durmitor national park in Montenegro, Balkans. Durmitor national park in Montenegro, Balkans. Durmitor national park in Montenegro, Balkans.