Réserve naturelle nationale de Lilleau des Niges

The Réserve naturelle nationale de Lilleau des Niges is one of the most ecologically significant sites on Île de Ré, occupying the northern tip of the island within the municipality of Les Portes-en-Ré, in the Charente-Maritime department. Spanning 121 hectares of former salt ponds, salt meadows and mudflats, the reserve preserves a mosaic of habitats typical of the French Atlantic coast. It was granted national nature reserve status in 1980 and has since been managed by the Ligue pour la Protection des Oiseaux (LPO), France's national bird conservation organization.

Why is this site so important for birds?

The reserve sits within the Fier d'Ars, a large, almost entirely enclosed bay that naturally shields the area from ocean swell and strong offshore winds. This sheltered position turns the mudflats and disused salt basins into an unusually calm environment for feeding, resting and breeding. As a result, 372 species have been recorded within the reserve, spread across 11 taxonomic groups, ranging from waders to ducks and gulls. Many are migratory birds that stop here during their long journeys between northern Europe and Africa, while others remain year-round as resident populations.

What can visitors expect to see while walking through the reserve?

A network of trails crosses the site and is free to access at any time of year, allowing visitors to explore the landscape of former salt pans at their own pace. The geometric outlines of the old salt basins, a legacy of centuries of salt production on the island, are still visible today, now colonized by salt-tolerant vegetation and used as habitat by waterbirds. Following the paths and embankments leads to the Maison du Fier, a small museum housed in a former salt shed, where visitors can learn more about the local flora, fauna and the historical exploitation of Île de Ré's salt marshes.

How should visitors plan a trip here?

Since the reserve exists primarily to protect birdlife, bringing binoculars makes a significant difference to the experience compared with an ordinary walk through the landscape. The season matters too: spring and autumn migration periods bring the widest variety of species, while winter draws large concentrations of waterbirds seeking shelter within the enclosed Fier d'Ars bay. The trails are flat and easy to walk, making the site accessible to visitors of most ages, though sturdy footwear is recommended given the damp and occasionally muddy ground.

Frequently asked questions

Is entry to the reserve free? Yes, access to the trails is free of charge and available year-round.

Who manages the reserve? The Ligue pour la Protection des Oiseaux (LPO), a French bird conservation organization, oversees the site.

How many bird species can be found here? The reserve has recorded 372 species across 11 taxonomic groups.

Is there anything to see besides birdwatching? The Maison du Fier, a former salt shed converted into an educational space, offers insight into the local ecosystem and the history of salt production in the area.

Where exactly is the reserve located? At the northern tip of Île de Ré, within the municipality of Les Portes-en-Ré, inside the sheltered Fier d'Ars bay.