Phenological variation of functional diversity (FDses) of dragonfly assemblages in Great Britain over the flight season of the group (a) Variation of multi-trait FDses over the season. (b) Variation of residual multi-trait FDses over the season after removing the effects of temperature and richness (Insert: LM: FDses ~ richness + temperature. Colour indicates day of the year). (c) Variation of body size FDses over the season. (d) Variation of community weighted means of body size over the season. Black lines represent LOESS models. FDses >0 indicates morphological overdispersion and FDses <0 morphological underdispersion relative to random assemblages of equal richness.