The Danube River is the most international river on the planet - its course runs across — or forms a part of the borders of several countries: Germany, Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria, Ukraine, and four capitals: Vienna, Bratislava, Budapest and Belgrade. The Danube Delta is a wildlife enthusiast’s (especially a bird watcher’s) paradise. Travelers can spend three or more days exploring its passages, teaming with the highest concentration of bird colonies in all of Europe. The maze of canals bordered by thatch, willows and oaks entangled in lianas, offers the perfect breeding ground for countless species of birds, some of them from as far away as China and Africa. Millions of Egyptian white pelicans arrive here every spring to raise their young, while equal numbers of Arctic geese come here to escape the harsh winters of Northern Europe. Some 300 species of birds make Danube’s Delta their home, including cormorants, white tailed eagles and glossy ibises. The bird watching season lasts from early spring to late summer. Birds are not the only inhabitants of the Delta. There is also a rich community of fish and animals, from wildcats, foxes and wolves, to even an occasional boar or deer. Altogether, 3,450 animal species can be seen here, as well as 1,700 plant species.