The pigeon had particularly large breast muscles that indicate powerful flight ( musculus pectoralis major for downstroke and the smaller musculus supracoracoideus for upstroke ).
2.
Less radical is the assessment that due to the lack of a keeled sternum and a high acrocoracoid, the " Musculus pectoralis minor " could not serve as a " M . supracoracoideus " lifting the humerus via a tendon running through a " foramen triosseum ".
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