There was considerably more variation in the proportion of protein and carbohydrate consumed in natural compared to anthropogenic diets during autumn, with one population (Gau et al. (2002), Diet_ID: 2; Table 1) consuming very little (2%) carbohydrate. Because this natural diet was a potentially influential observation (as assessed visually in R using a plot of the cooks.distance (Cook & Weisberg, 1982) function in the {base} package), we performed a sensitivity analysis by running a separate LM and ANOVA for autumn without that diet. Anthropogenic and natural diets remained significantly different (ANOVA p = .021) in autumn after removal of the Gau, Case, Penner, and McLoughlin (2002) diet, albeit with a lower mean proportion of protein and lipid and higher proportion of carbohydrate (P = 0.232, C = 0.515, L = 0.253)—thus, the mean autumn diet of natural populations was closer to the intake target region with that diet removed.