Average peak deceleration values measured for three-dimensional printed scaled models of kingfisher beaks classified as aquatic foragers (blue), mixed foragers (grey) and terrestrial foragers (green). Aquatic and terrestrially foraging species' dive decelerations are significantly different (ANOVA F28,2 = 7.645, p = 0.002, Tukey HSD, p = 0.002). This result is not affected by phylogenetic relatedness (phylogenetic ANOVA, F = 7.64, p = 0.047). (Online version in colour.)