Results of statistical tests on effects of tongue flicking behavior.

Wilcoxon signed rank test for paired data was used to test whether changes in sugar concentration occurred between offered sugar concentration and concentration of crop content after tongue flicking (columns 2, 3). Changes were significant for all tested concentrations and both species. Correlation between tongue flicking time and resulting sugar concentration was tested using Spearman rank correlation (columns 4, 5), and was significant in all cases except 30% initial concentration for E. championiResults of statistical tests on effects of tongue flicking behavior.