The proportion of landings on green flowers for bees that watched (a) live foraging bee models and (b) artificial models (± s.e.). Values within a panel indicated by different letters are significantly different. Pairwise-comparisons between model colours were made with Bonferroni adjustment: (a) GM/C, p<0.03; GM/OM, p<0.01; OM/C, p>0.90 and (b) GM/C, p=0.001; GM/OM, p<0.001; OM/C, p>0.90.