The various French public actions in support of biodiversity conservation have led to developing and rationalizing the production of knowledge on nature. Implementation of the “système d’information sur la nature et les paysages” (SINP) by the Ministry of Ecology aims to standardize data recording. Its purpose is to remedy the lacks in data recording and make data retrieval easier. Our paper focuses on the consequences of SINP implementation for NGOs who are the main data collecting structures. Our analysis is based on a socio-anthropological approach and considers the production of data to be linked to a general process of standardization on the one hand and as result of NGO activity on the other. We question whether the two logics are compatible.