In March 2011 C.E., the environment ministers of Austria, Croatia, Hungary, Serbia, and Slovenia gathered in Gödöllő, Hungary, and signed a declaration that had been building for nearly two decades. Their goal: to protect a 700-kilometer corridor of wild rivers, floodplain forests, and gravel bars stretching across five nations — a place ecologists call “Europe’s Amazon.”
What the agreement established
- Mura-Drava-Danube reserve: The declaration committed five countries to jointly protect the lower Mura, Drava, and Danube river systems across roughly one million hectares of some of Europe’s most biodiverse inland habitat.
- Transboundary conservation: The agreement set the legal and diplomatic foundation for what would become the world’s first UNESCO five-country biosphere reserve, formally designated on September 15, 2021 C.E.
- Ministerial declaration: Signed under Hungary’s EU Presidency, the document committed all five governments to harmonize conservation management across 12 major protected areas along these rivers.
A river system unlike any other in Europe
The Mura, Drava, and Danube rivers do something rare in modern Europe: they still behave, in places, like rivers are supposed to. They flood. They shift. They carry sediment and build islands. They sustain the continent’s highest density of breeding white-tailed eagle pairs, along with black storks, little terns, beavers, and otters.
More than 250,000 migratory waterbirds rest and feed along these rivers every year. The floodplain forests — ancient, layered, and difficult to replicate — act as natural flood buffers, filter drinking water for millions of people, and anchor a web of life that intensive agriculture has largely erased from the rest of central Europe.
The “Amazon of Europe” nickname is not casual. Like the Amazon Basin, this system functions as a continental reservoir of biodiversity in a region where such reservoirs are increasingly scarce. The IUCN’s frameworks for large-scale protected areas recognize transboundary corridors as among the most effective tools for preventing biodiversity loss at scale — because wildlife doesn’t stop at borders, and neither does a river.
Thirty years in the making
The 2011 C.E. signing didn’t come from nowhere. WWF and local conservation partners had been working across all five countries for nearly 30 years to reach this moment. Earlier, Croatia and Hungary had signed a bilateral declaration on a shared biosphere reserve along the Mura-Drava corridor — a precursor step that helped demonstrate what five-country coordination might look like.
The challenge was significant. These are five countries with different legal systems, different languages, different histories, and — in some cases — difficult political relationships. That their environment ministers sat down together and committed to a shared conservation framework is itself a kind of diplomacy. It used rivers as the common ground.
The UNESCO designation process that followed took another decade. Individual national biosphere reserves were designated along the way, each feeding into the larger framework. When UNESCO formally recognized the Mura-Drava-Danube Transboundary Biosphere Reserve in September 2021 C.E., it completed a process that the 2011 C.E. declaration had set in motion.
What the rivers give back
Conservation here isn’t only about wildlife. The natural floodplains along the Mura, Drava, and Danube reduce flood risk for downstream communities, maintain groundwater quality, and support local economies built around fishing, tourism, and sustainable forestry. These are services that engineered river systems — straightened, dammed, dredged — consistently fail to provide at the same scale.
The reserve’s management framework aims to balance all of this: protecting habitat, restoring degraded river reaches, and supporting the human communities who have lived alongside these rivers for centuries. Restoration is an explicit goal — not just drawing a line around nature, but actively helping rivers recover their natural dynamics where they’ve been altered.
Researchers and planners studying river corridor restoration in Europe have increasingly pointed to the Mura-Drava-Danube system as a model for what large-scale, transboundary restoration can look like when governments commit early and conservation organizations do the sustained work of building cross-border trust.
Lasting impact
The 2011 C.E. declaration mattered beyond the rivers themselves. It demonstrated that conservation could be used as a vehicle for international cooperation between countries whose political and historical relationships were sometimes strained. That the agreement was signed under an EU Presidency gave it additional diplomatic weight and helped show other regional blocs what coordinated conservation governance could look like.
Since the UNESCO designation in 2021 C.E., the reserve has become a reference point for large-scale transboundary conservation globally. UNESCO’s Man and the Biosphere Programme now points to the Mura-Drava-Danube as a template for future multi-country designations. The model — lengthy groundwork, bilateral agreements building toward multilateral commitments, harmonized management of existing national protected areas — is being studied by conservation planners in other river basins.
The white-tailed eagles nesting in those floodplain forests didn’t need a declaration. But the people who would protect their habitat did.
Blindspots and limits
The rivers remain under pressure. Hydropower development upstream, ongoing sediment extraction, and agricultural intensification along the floodplain margins continue to degrade habitat even within the reserve’s borders. A declaration and a UNESCO designation create a framework — they don’t automatically reverse 150 years of river engineering or stop infrastructure proposals that emerge from national energy policy rather than conservation planning. The reserve’s long-term ecological health depends on whether the political commitments made in Gödöllő in 2011 C.E. hold against the economic pressures that will inevitably test them.
It’s also worth noting that local Indigenous and traditional communities along these rivers — whose knowledge of the floodplains spans generations — have not always been centered in the formal governance structures that international conservation frameworks tend to produce. The Convention on Biological Diversity has repeatedly found that conservation outcomes improve when local and traditional knowledge is integrated structurally, not just consulted.
Read more
For more on this story, see: Amazon of Europe — Five-Country Biosphere Reserve
For more from Good News for Humankind, see:
- Ghana expands marine protection at Cape Three Points
- Uganda reintroduces rhinos to Kidepo Valley
- The Good News for Humankind archive on marine conservation
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