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60  SECTION I  III  The Birds










































                        A                                        B










                                                 Proximal       Proximal
                                                  clavicle      coracoid


                                             Triosseal
                                               canal


                                                                            Humerus
                                          Scapula




                                                                   Humeral joint
                                   Distal
                                 coracoid





                                C
                    Figure 5-3 • The defl eshed shoulder joint of a great horned owl seen from above with the wing extended and showing the triosseal canal
                    and its constituent parts. A, Orientation. B, Unlabeled close-up. C, Labeled close-up.











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