Although it is one of the most important river ecosystems in this part of Europe, the Una River still lacks adequate protection. Significant parts of its middle course in Bosnia and Herzegovina, as well as a smaller section flowing through Croatia, remain unprotected, increasing pressure on the entire Una basin. If the initiative to establish a cross-border national park is accepted, the situation could change.

In this open webinar, researchers from the 2026 Una Science Week present what they found: well-known species and hidden ones, above and below ground. Their findings show why the Una is one of Europe's most remarkable river systems.

Following seven days of intensive fieldwork, an international team of over 70 scientists and students has officially concluded Una Science Week.

River protectors from across Europe are linking arms with the community of the Una Spring in Croatia this Friday to protest the construction of an illegal dam at the source of this unique river, “The One”. Join the protest!

Like many others of Europe's last free-flowing rivers in the Balkan region, the Una is in permanent danger of being destroyed by a series of hydro dams. It is one of the few last rivers in the world with a healthy, wild Hucho population and an amazing fishery. For Bosnian guide Anes Halkic, the Una is not just a river. It is his life. Watch the trailer!