Earthworms modify soil functioning via casting production activities. We examined 9 earthworm species. We explored the impact of adding behavioral and physiological traits. we analyzed the links between the morpho-anatomical, physiological and behavioral traits and the physicochemical properties in casts. Results indicated significant differences among species. Earthworm species significantly modified all physicochemical parameters. Co-inertia analysis also indicated significant covariation between earthworm traits and casts properties and allowed to identify 9 traits that are the most influential.