The Odiel Marshes Biosphere Reserve is a vital coastal wetland ecosystem in southern Spain, renowned for its rich biodiversity and superb opportunities for birdwatching and nature walks along its estuarine landscapes.
Located on the southwestern coast of Andalusia near the mouth of the Odiel and Tinto rivers, the Odiel Marshes Biosphere Reserve encompasses a diverse mosaic of tidal mudflats, salt marshes, dunes, and Mediterranean scrub. Covering roughly 24,000 hectares, this reserve is internationally recognized for its critical role as a habitat for over 200 bird species, including flamingos, herons, and various migratory waterfowl. The reserve's unique geography is shaped by the estuarine dynamics of the Odiel and Tinto rivers, creating nutrient-rich waters that support abundant fish and invertebrates, which in turn sustain the vibrant bird populations. Historically, the marshes were used for traditional fishing and salt extraction, activities that have largely been preserved to maintain the cultural landscape. Recreation visitors enjoy a range of activities including birdwatching, guided eco-tours, photography, and hiking on established trails that wind through the marshland, offering spectacular views of the wildlife and natural environment. Additionally, the reserve’s proximity to the cities of Huelva and Punta Umbría make it accessible for day trips and eco-tourism. The reserve is also a designated Special Protection Area (SPA) under the EU Birds Directive, highlighting its importance for conservation. Sustainable tourism initiatives aim to balance the protection of fragile habitats with public enjoyment and environmental education.
The Punta del Sebo salt marshes known for spectacular flamingo colonies
Diverse bird species including the endangered Audouin’s gull and purple swamphen
Eco-interpretation centers focusing on wetland conservation and local culture
Quiet hiking trails along tidal flats with panoramic views of the Atlantic coast
Extensive mudflat areas exposed during low tide that serve as critical feeding grounds for migratory shorebirds.
A traditional salt extraction area which is also an important habitat for specialized wildlife and a scenic cultural landmark.
Nearby archaeological caves with prehistoric paintings adding cultural depth to the natural Reserve.