Water being rare on the Causse, so-called lavognes – clay basins for retaining rainwater – were created by locals for their flocks. Lavognes are a part of local agro-pastoral heritage, but they are also of undeniable ecological interest. A large number of animals (mammals, birds, insects, etc.) come to drink and hunt here, dragonflies and amphibians even to reproduce. About 200 lavognes have been identified on the Grands Causses, but only too often a lack of maintenance leads to their disappearance.