A crop auxiliary, in a broad sense, is a living organism that provides ecosystem services to facilitate agricultural production. It replaces all or part of the farmer’s work and the inputs brought by the farmer. This definition includes pest-fighting microorganisms and invertebrates as well as vertebrates such as certain birds, mammals and amphibians that feed on pests or weed seeds. It also encompasses pollinating insects that allow the fertilization of cultivated plants...[Dictionary of agroecology : https://dicoagroecologie.fr/en/encyclopedia/crop-auxiliaries/]