Functional traits data for 2088 species (morphospecies, individuals) from 144 arthropod families sampled in agricultural landscapes across Europe. All traits are categorical and based on published literature or expert knowledge. They are described in Table 1 and Appendix S1 of Martin et al. (2019). The traits included are: feeding habit ('Functional group'), diet breadth, agricultural specialism, diet life history, overwintering habitat, dispersal mode, and stratum. Species' names were resolved in R package taxize