Réserve naturelle des Tre Padule de Suartone

Réserve naturelle des Tre Padule de Suartone is a small but scientifically significant nature reserve at the southern tip of Corsica, within the municipality of Bonifacio, roughly 10 km from the town itself. It covers just under 218 hectares of the granite plateau of Campucceli, home to four temporary Mediterranean ponds that give the reserve its name and form its ecological core.

What are "padule" ponds and why are they so rare?

"Padule" is the Corsican word for marsh or pond. The ponds here belong to a category known as Mediterranean temporary ponds — ecosystems that fill with water in autumn and winter and dry out completely during the hot summer months. This seasonal cycle of flooding and desiccation has shaped a highly specialized flora and fauna, adapted to extreme and fluctuating conditions. Habitats like this are among the most threatened in Europe: they are easily lost to drainage for farming or construction, and once destroyed they are virtually impossible to recreate.

How the reserve came to be

The area was granted legal protection by a decree issued on 11 December 2000, establishing it as a national nature reserve. Two years later, in April 2002, the site joined the Natura 2000 network as a Site of Community Importance (code FR9400590). Its highest distinction came on 2 February 2007, when it was designated a Ramsar Site — recognized under the international convention for the protection of globally significant wetlands, listed as site number 1651. This three-tier protection — national, European, and international — underlines just how exceptional this small corner of Corsica is on a continental scale.

Flora and fauna

Beyond the four main ponds, the reserve also contains seasonal streams, damp meadows, bare granite rock slabs, and low maquis scrubland, creating a mosaic of habitats that supports rich biodiversity. It shelters plants that are rare not only in Corsica but across the wider Mediterranean, including threatened and legally protected species such as Pilularia minuta, Isoetes velata, and the buttercup Ranunculus revelierei — small, water-dependent plants able to survive the cyclical droughts thanks to seeds or spores that can lie dormant in dry soil for years.

The reserve is also a haven for amphibians, hosting four species: the Tyrrhenian tree frog (Hyla sarda), endemic to Corsica; the Tyrrhenian painted frog (Discoglossus sardus), endemic to Corsica and Sardinia; the green toad (Bufotes viridis); and the pool frog Pelophylax lessonae bergeri. Finding four amphibian species coexisting in such a compact area is unusual and stands as strong evidence of how well-preserved this freshwater ecosystem remains.

What to know before visiting

The reserve lies away from Bonifacio's main tourist routes, set on a quiet, stony inland plateau. It appeals to visitors interested in nature, botany, and solitude rather than those seeking a conventional sight with visitor infrastructure. The best time to observe the ponds is during autumn, winter, and early spring, when the basins are filled with water and the aquatic flora is at its richest — by summer, most of the ponds have dried up almost entirely, leaving behind cracked granite ground.

Frequently asked questions

Is the reserve open to the public? The site holds protected status, so visitors should keep to marked paths and avoid disturbing the habitats.

Why do the ponds sometimes disappear? This is the natural cycle of Mediterranean temporary ponds — they dry out in summer and refill with rainwater each autumn and winter.

What makes this place special? The rare combination of national reserve status, Natura 2000 designation, and international Ramsar recognition packed into such a small area, alongside four amphibian species and several critically threatened plants.