Fig. 2

Immediate displacement for different movement categories (pre-disturbance movement, movement caused by air force disturbance, by walker disturbance and by non-anthropogenic disturbance). The largest recorded displacement of 4.1 km through walker disturbance is outside the scale of the graph and not shown. Letters indicate significant differences among groups; numbers represent sample size per category. Whiskers extend from the quartiles to the furthest measurement within 1.5 times the interquartile range. Note that, for sample size purposes, disturbance categories used in Fig. 2 are not the same as those in Table 1. Walker includes experimental disturbances