Spain's Endangered 'Sad Duck' Makes a Comeback After €6.37 Million Wetland Rescue

Europe's Most Endangered Duck Is Bouncing Back

It is known affectionately in Spain as the "sad duck" — a nickname earned from the dark markings around its eyes that give it a permanently mournful expression. Scientifically it is the marbled teal (Marmaronetta angustirostris), and it holds the unwanted distinction of being Europe's most endangered duck species.

But after years of decline, there is genuine cause for optimism. A €6.37 million wetland rescue project — the LIFE Marbled Teal project — has delivered results that scientists are cautiously calling a recovery. The breeding population has nearly quadrupled since 2021, with 172 breeding females with chicks recorded — the highest figure in two decades.

A Return to Murcia After 15 Years

One of the most striking outcomes of the project is the return of the marbled teal to parts of the Region of Murcia where the species had not been seen for 15 years. New breeding sites have been confirmed across southern and eastern Spain, spanning the three regions covered by the project: Murcia, Andalucia and the Valencian Community.

The restoration work covered more than 3,600 hectares of wetland habitat — an area that had been degraded by pollution, water mismanagement and agricultural encroachment over decades.

How They Did It

The LIFE Marbled Teal project combined traditional habitat engineering with some innovative approaches to bring the species back from the brink:

• Water management improvements to restore natural wetland hydrology and create the shallow, vegetation-rich conditions the marbled teal needs to breed
• Degraded wetland system restoration — clearing invasive species, improving water quality and reconnecting fragmented habitats
• GPS-equipped livestock used for vegetation management — a creative solution that harnessed grazing animals to maintain the right balance of plant cover without heavy machinery
• Release of over 3,700 captive-bred birds into wild populations to bolster numbers while habitat recovery caught up
• Cooperation agreements with local farmers and landowners, whose support is essential for any conservation project that depends on privately owned land
• Partnerships with hunting organisations to reduce the risk of the marbled teal being misidentified and shot — a significant threat given how similar it can look to other duck species in poor light

Why the Marbled Teal Was in Trouble

The marbled teal's decline is a story repeated across Mediterranean wetlands. Its preferred habitat — shallow, warm, vegetation-rich lagoons and marshes — has been systematically reduced across southern Europe and North Africa through drainage for agriculture, urban development, water extraction and pollution.

Spain's wetlands, while still home to some of the most important in the western Mediterranean, have lost vast areas of habitat over the 20th century. The marbled teal, which depends on very specific conditions to nest and raise chicks, was one of the species hit hardest.

Cautious Optimism, Not Complacency

Scientists working on the project are careful not to declare victory. They describe the current situation as one of "cautious optimism", stressing that long-term stability for the species depends on sustained wetland management — not a one-off investment.

The challenges that drove the marbled teal to the edge of extinction have not disappeared:

• Wetland loss and degradation continue in parts of Spain
• Pollution remains a threat to water quality in key habitats
• Disease risks — particularly avian influenza — can devastate waterbird populations
• Hunting-related threats, despite the partnership work carried out under the project
• The long-term maintenance of restored habitats requires ongoing funding and management commitment

The project demonstrates what is possible when significant resources are deployed in a coordinated way across multiple regions. But the marbled teal's future will depend on whether that commitment is sustained beyond the life of a single EU-funded initiative.

A Small Duck, a Big Story

The marbled teal may not have the star power of the Iberian lynx or the Spanish imperial eagle, but its recovery is no less significant. Wetland ecosystems support an enormous range of species — from fish and amphibians to wading birds and insects — and the restoration work carried out under this project will benefit far more than one small duck.

For now, the sad-looking bird with the droopy eyes is, for once, giving conservationists a reason to smile.

This article is based on reporting from Murcia Today, published April 22, 2026.