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218  SECTION I  III  The Birds





































                                                                                Figure 20-13  •  Close-up view of the central visceral
                                                                                silhouette of an eagle conveying the misimpression of
                                                                                cardiomegaly as a result of (1) oblique positioning
                                                                                causing the heart to falsely appear widened and (2) a
                                                                                genuinely small liver caused by starvation.







































                                                                       Figure 20-14  •  Ultraclose view of the carina of a great horned owl
                                                                        (seen from below) shows the terminal portion of the trachea, the
                                                                        syrinx, and the flattened angular principal bronchi.











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