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Fig. 6. Lateral projection of the tracks of the wingtip, thumb (at 2.3 and 3.1 m
s-1), and tail tip (at 2.3, 3.5 and 4.0 m s-1) relative
to the shoulder joint of Glossophaga soricina flying at different
flight speeds. The stroke plane angle increases and wing beat frequency
decreases with increasing flight speed. The up and down movements of the tail
(uropatagium) are most pronounced at the slowest speeds.