Fig. 1. Ingestive responses of caterpillars: (A–C) to the control, aristolochic acid (0.38 mmol kg^–1) and salicin (157 mmol kg^–1) diets following 48 h of exposure to the control diet (N=30 caterpillars), (D–F) to the control and aristolochic acid (Aristo. acid) diets following 48 h of exposure to the aristolochic acid diet (N=24) and (G–I) to the control and salicin diets following 48 h of exposure to the salicin diet (N=24). We present three measures of ingestive behavior across the 2 min brief-access biting test: total intake, total number of bites and bite size. We compare the median values in each panel (± median absolute deviation) using the Wilcoxon matched-pairs signed-rank test (*P0.025).