Gregariousness is associated with parasite species richness in a community of wild chimpanzees. - Deere JR; Schaber KL; Foerster S; Gilby IC; Feldblum JT; VanderWaal K; Wolf TM; Travis DA; Raphael J; Lipende I; Mjungu D; Pusey AE; et al. (Behavioral ecology and sociobiology, 2021)