Having changed little since the 18th century, this site is subject to environmental management and scientific monitoring designed to preserve the exceptional richness of its natural habitats.

Reed beds, ponds, wet meadows, dry meadows, hedgerows and limestone hillsides form a mosaic of habitats that are home to remarkable biodiversity. Twelve heritage habitats have been identified here, including eutrophic standing waters and extensive reed beds, which serve as true refuges for aquatic wildlife.

The flora comprises 457 plant species, including 14 heritage species. Throughout the seasons, visitors can see wild orchids, the loose-flowered orchid, the marsh orchid, water germander, southern bladderwort, common adder’s-mouth and Amelle aster, all of which bear witness to the ecological richness of this wetland.

The wildlife is equally remarkable. The pond is home to 130 species of birds, including the Little Bittern, the Kingfisher, the Reed Bunting and various types of Reed Warbler, which find the reed beds an ideal place to feed, breed or stop off during their migration. The terrestrial habitats are also home to numerous amphibians and reptiles, as well as heritage insects such as the green damselfly and the stag beetle.

A real window onto nature, the birdwatching hide allows visitors to observe wildlife without disturbing it. Situated on the edge of the reedbed, it offers a prime vantage point for watching waterbirds and aquatic life all year round.
Depending on the season, you can witness bird migrations, observe breeding species or spot those that simply stop off at the pond.
An educational wheel installed in the observatory helps visitors identify the species present depending on the month of their visit, making each visit a different experience. With a little patience and a pair of binoculars, dragonflies, herons, kingfishers and many other species reveal themselves to the most observant visitors.

You can explore the Étang de Lemps along an educational trail featuring nine information points that explain how wetlands work, water management, the landscapes of Isle-Crémieu, and the close links between the various natural habitats and the species that inhabit them.

For a more interactive experience, two orienteering trails are also available on the site: one for adults and one for children.
Each trail is 3.6 km long and features eight checkpoints; they follow the same route but include questions tailored to each age group. It’s an original way to explore the Étang de Lemps, taking in its natural heritage whilst enjoying a family challenge.