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Files in this Data Supplement:
Movie 1. Aylesbury duck moving across forceplates. Aylesbury ducks were capable of ‘walking’ and ‘running’ (using mechanical definitions), but never achieved running with aerial phases. Movie recorded at 63 frames s−1, shown at half speed.
Movie 2. Mallard running across forceplates. Mallard ducks were capable of walking and running, even capable of running with an aerial phase (as in this movie). Filmed at 250 frames s−1, shown at 1/10th speed.
Movie 3. Indian Runner duck running across forceplates. Indian Runners were capable of running, including runs with aerial phases (as in this movie), but never displayed ‘walking’ gaits following the mechanical definition. Filmed at 250 frames s−1, shown at 1/10th speed.
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