ecology 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 Beautiful white heron,little egret, Egretta garzetta, on rock formation in Skadal Lake. Djurdjevic bridge over Tara river in Montenegro. Djurdjevic bridge over Tara river in Montenegro. Djurdjevic bridge over Tara river in Montenegro. Black lake, Crno Jezero, with mountain views in Durmitor park, Montenegro. Black lake, Crno Jezero, with mountain views in Durmitor park, Montenegro.
