Working with farmers to halt the loss of biological diversity? Find out more on the practical implementation of the “co-design” approach in our new ECO²SCAPE publication: https://doi.org/10.1002/2688-8319.12169. In this paper, we outline the importance of co-design in the context of farmland biodiversity conservation, which refers to the participatory design of conservation measures for a secific region (typically at the landscape level) through close collaboration between farmers, scientists and other stakeholders.