In the heart of Isle Crémieu lies the étang de Lemps, a representative pond of the wetlands in Nord Isère. This 23ha site is part of Optevoz and Saint-Baudille-de-la-Tour villages.
A thematic trail and an observatory with disabled access introduce visitors to the lake's aquatic life, including the remarkable European pond turtle, an endangered specie.

Emblem of the site, the pond turtle is a threatened specie due to the disappearance of its habitat. The étang de Lemps is an ideal environment (water, shade, adapted banks and dry slopes for the laying of eggs). the live, feed and breed at the water's edge.

How do you recognize it? It is about 20cm long, the males have red eyes and the females have small, yellow eyes. They have a black body with yellow dots.
Among the 457 plant species surveyed, there are orchids, marsh pennywort, southern adderstongue, European Michaelmas daisies...

Flora: 14 heritage species (Lax-flowered orchids, Anacampus palustris, Bombycilaena erecta, Marsh pennywort, Knautia Timeroyii, Spiny water nymph, Adder's tongue, Threadleaf crowfoot, Golden dock, Downy woundwort, Teucrium scordium, Common meadow rue, Southern bladderwort, Smooth vetch)

Fauna: 3 invertebrate heritage species (Small red-eye damselfly, Stag beetle, Desmoulin's whorl snail) 17 species of reptiles and amphibians (Agile frog, European pond turtle...) 130 species of birds (Little bittern, Reed bunting) , Kingfisher, Eurasian reed warbler, Great reed warbler...)

Habitats: 12 heritage habitats (eutrophic stagnant water, phragmites)