Fig. 1. Examples of wingbeat test point time histories. (A) A comparison of three recording formats at different frame rates recorded at the same time. The DigiBeta at 48 frames s^-1 (diamonds) and VHS at 24 frames s^-1 (triangles) sequences are offset from the cine recording at 200 frames s^-1 (squares) for clarity. (B,C) Typical time histories of a large microbat (B) and a megabat (C) at low frame rates. The solid line in each case is a typical spline fit applied to the data. The broken lines in B are the author's interpolation. In B, Y and N denote the peaks used and not used, respectively, in the average amplitude range assessment. V, flight speed; f_w, wingbeat frequency; _w, wingbeat amplitude.

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