The amount of power produced by the pectoralis muscles varied depending on flight speed. In the case of the cockatiels, the minimum output was 1.3 W at 5 m s-1, while at maximum output it was 3.7 W at 14 m s-1. Meanwhile, doves had a minimum output of 4.3 W at 7 m s -1, and a maximum output of 7.5 W at 17 m s-1. Regarding wing-beat frequency data, cockatiels reached their minimum at 9 m s-1, while doves had a wider minimum range from 7 to 13 m s-1. The power curve for the magpies remained relatively flat between 4 and 12 m s-1, while cockatiels produced acutely concave curves, and doves produced an intermediate shape.
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