Mean weighted pollen scores for each species analyzed, with standard error bars. Blue bars represent species in subfamily Eristalinae, orange bars Syrphinae, and grey bar Apis mellifera. Shared letters above bars denote no significant pairwise difference (pairwise Wilcoxon Rank Sum Test, alpha=0.05 with Bonferroni correction). Apis mellifera is included for comparison to syrphids but was not included in pairwise tests.