Fig. 5. Relationships between tegula burst duration and wing stroke parameters (see Fig. 2) for the fore- (i) and hindwing (ii) tegulae (data from four individuals shown, each given in a different colour). In both pairs of tegula organs, the burst duration depends on the duration of the downstroke interval (A) (P<0.05, regressions indicated by solid lines); however, burst duration is not significantly related to stroke amplitude (B) (P>0.05, regressions indicated by dashed lines). (C) Tegula burst duration is significantly related to the angular velocity during the downstroke (P<0.05). For each individual, data points represent means ± S.D. (indicated as caps of error bars only) calculated from 5-21 observations during 3-5 flight episodes. Relationships for all animals investigated are given in Table 1.