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Fig. 5. Wing bending during the first upstroke. The images show a comparison of
wing shape during the first upstroke after take-off (A) and the second
upstroke (B) of an example escape take-off. Two camera views are shown for
each stroke (top and side views). The images show the fly's wing position 7
frames (1.2 ms) after the start of the respective upstrokes. The red arrows
point to a flexure point along the left wing. The wing bends nearly 90° at
this point during the first upstroke, but only minimal bend is evident during
the second, more `normal' upstroke (see also supplementary material Movie 3).
The right wing also appears to bend in a similar fashion.
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