Fig 2 Relationships between sound production and DF or FID in the first (A, B), second (C, D), and third (E, F) escape attempts. Data on the first attempt (A, B) were obtained from males that flew in the first attempt. Data for the second (C, D) and third (E, F) attempts were obtained from males that flew in all three consecutive escape attempts. The number of observed individuals is shown in parentheses. The centerline, lower edge, and upper edge of the box indicate the median, first quantile, and third quantile, respectively. The bottom of the lower whisker is the minimum value that is not lower than the first quantile minus 1.5 times the interquartile range. The top of the upper whisker is the maximum value that is not higher than the third quantile plus 1.5 times the interquartile range. The data points that are not contained in the box-and-whisker plot are represented as open circles.