At the same time as the
downstroke, the wing tip (hand)
points down, pushing the air
backwards and pushing the bird
forward’s
The Source:
Page #9
Ornithology #11
Flight

At the same time as the
downstroke, the wing tip (hand)
points down, pushing the air
backwards and pushing the bird
forward’s
The Source:
Page #9
Ornithology #11
Flight
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