Vistula Lagoon million. However, major ecological considerations stand in the way. For example, mammal migration along the lagoon could be disrupted. Also, the inflow of brackish waters from the Baltic sea could result in serious unbalancing of the lagoon's freshwater ecosystem. From 1772 until 1918, the lagoon was part of the Kingdom of Prussia, which had become part of the German Empire in 1871. Between 1920 and 1946 it was split between Germany and the Free City of Danzig. At present state since 1945 its eastern part belongs to Russia (formerly USSR), Poland has 43.8% of its area at lagoon's western side.
Ōkārito Lagoon more than 76 other bird species have been recorded at Ōkārito. These species include migratory waders, gulls, shags and terns on the estuarine mud flats as well as black swans, scaup, crested grebes, and ducks in freshwater areas. Tui, bellbird, kingfishers, pigeon, crakes, fern birds, and bitterns and crakes inhabit the wetland areas. The rarest species of kiwi, the Okarito kiwi, or Rowi, is also found near the town of Ōkārito. It is also the only nesting ground for white herons in New Zealand. Ōkārito Lagoon Ōkārito Lagoon or Okarito Lagoon is a coastal lagoon on the West Coast of