Each year, numerous professional biologists and volunteers in Québec (Canada) collect important data concerning the at-risk species that occur in the province. This information is used by the Québec Conservation Data Centre (CDPNQ) to help ensures adequate conservation of the species concerned, and to inform land use and management; topics for which the CDPNQ is regularly consulted. This article seeks to highlight the importance of this collaboration and to acknowledge the naturalists, many of whom are volunteers, who help gather the information used.