This bone is an anchor for the wing’s.
Without this strong structure, a bird can’NOT fly.
Most flightless bird’s do NOT have a keel.
For example, in the ostrich the sternum is flat like a human’s, as the ostrich doesn’t fly.
In the pigeon on the next page, the keel is pronounced and curved, like a ship.
The flight muscle’s attach here, on either side.
The Sorce:
Ornithology #9
Skeletal System Part #2
Page #2
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