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A pelican is a bird, not a person. The knees bend the other way.

I get what you mean, but those are the ankles. The knees are higher up and bend the same way as a person's. https://en.wikipedia.org/wiki/Bird_feet_and_legs

A bit more direct

A pelican wouldn't/couldn't pedal with its ankles. It doesn't make any more physiological sense than a human doing that.