Includes bibliographical references and index.

Preliminary Material / W. H. Thorpe -- I. Preface / W. H. Thorpe -- II. Authorship / W. H. Thorpe -- III. General Introduction / W. H. Thorpe -- IV. The Duetting Laniidae with Special Reference to the Species of Laniarius : Their Geographical Distribution and Ethological and Ecological Isolation / W. H. Thorpe -- V. Laniarius Aethiopicus and its Races / W. H. Thorpe -- VI. Experimental Aviary Studies of Laniarius Aethiopicus / W. H. Thorpe -- VIIa. Laniarius Erythrogaster : The Black Headed Gonolek / W. H. Thorpe -- VIII. Musical Aspects of the Vocalizations of Laniarius Aethiopicus and L. Ferrugineus / W. H. Thorpe -- IX. The Genus Cossypha : The Robin Chats / W. H. Thorpe -- X. The Grass Warblers: Family Sylviidae Genus Cisticola / W. H. Thorpe -- XI. Acknowledgements / W. H. Thorpe.

English

Description based on print version record.