Studies on the Muscles of the Pelvic Appendage in Birds II: The Heterogeneous Order Falconiformes

Introduction . ------102 Material and Methods 103 Acknowledgements -1 03 Review of recent literature -103 Review of the muscles of the pelvic limb 104 Modifications of the pelvic limb in the higher aroups of falconiform birds -109 American vultures, Family Cathartidae109 Secretary bird, Family Sagittariidae 110 Other falconiform birds, Families Accipitridae, Panldionidae and Falconidae -111 Summary of differences noted between Pandion, Falco and the Accipitridae 112 Apparent differences between several genera of Accipitridae -114 Comparison of Cathartidae and Sagittarius115 Comparison of Sagittarius and typical Falcones (Accipitridae, Pandionidae and Falconidae) -116 Comparison of Cathartidae and typical Falcones (Accipitridae, Pandionidae and Falconidae) -118 Comparison of Sagittarius and Pandion119 Comparison of Cathartidae and Pandion ----------------------------121 Comparison of Accipitridae and Falco with Pandion -122 Synopsis of the most important features of the muscles of th pelvic limb in falconiform birds 124 Discussion and Conclusions 125 References127