Fig. 3. Summary of wingbeat frequency (f_w) data. (A) Low-speed data. For each species, the mean values ± S.D. of the data at maximum range velocity (V_mr) are presented. The linear regression curve may be used to estimate f_w at V_mr for all species. (B) High-speed data. For each species, the mean value ± S.D. of the data (V>6 ms^-1) are presented. The linear regression curve may be used to estimate f_w for all species flying at high speeds. Mp, Mormopterus planiceps, Nt_s/w, the southwestern population of Nyctophilus timoriensis and Nl, Noctilio leporinus.