List of contributors; Introduction; Acknowledgements; Part I. Motivation and Perception: Editorial: 1; 1. Hierarchical organisation: a candidate principle for ethology Richard Dawkins; 2. Form and function on the temporal organisation of behaviour D. J. McFarland; 3. Attentional processes and animal behaviour R. J. Andrew; 4. Dynamic boundaries of patterned behaviour: interaction and self-organization John C. Fentress; 5. Sound production and perception in birds as related to the general principles of pattern perception W. H. Thorpe and J. Hall-Craggs; Editorial: 2; Part II. Function and Evolution: Editorial: 3; 6. Evolutionary rules and primate societies T.H. Clutton-Brock and P. H. Harvey; 7. Social organization, communication and graded signals: the chimpanzee and the gorilla Peter Marler; 8. Kin selection in lions and evolution B. C. R. Bertram; 9. The social function of intellect N. K. Humphrey; Editorial: 4; Part III. Development: Editorial: 5; 10. The place of genetics in the study of behaviour Aubrey Manning; 11. Stages in the early behavioural development of altricial young of selected species of non-primate mammals Jay S. Rosenblatt; 12. The study of animal play M. J. A. Simpson; 13. Rules and reciprocity in behavioural development P. P. G. Bateson; Editorial: 6; Part IV. Human Social Relationships: Editorial: 7; 14. Growing points in human ethology: another link between ethology and the social sciences? N.G. Blurton Jones; 15. Towards understanding relationships: dynamic stability R. A. Hinde and Joan Stevenson-Hinde; 16. How far do early differences in mother-child relations affect later development? Judy Dunn; 17. Does ethology throw any light on human behaviour? Peter B. Medawar; 18. Ethology in a changing world N. Tinbergen; Editorial: 8; Conclusion - on asking the right questions; Index.