The national modernisation of the natural areas of ecological, faunistic and floristic interest (ZNIEFF) is carried out on an ongoing basis that allows for recent data and updates as needed. In Auvergne-Rhone-Alpes, following the revision of the lists of critical species of terrestrial mammals and chiroptery validated in CSRPN, inventories are needed to update the terrestrial and chiropterian mammal data of type 1 ZNIEFF based on presence/absence with information on biological status if possible. Of the 4 auvergnat departments, this concerns 48 ZNIEFF for chiroptery and 69 ZNIEFF for other mammals. This three-year work will be entrusted to a service provider chosen by a call for tenders.