Barnard C.J., Thompson D.B.A. Gulls and Plovers. The Ecology and Behaviour of Mixed-Species Feeding Groups

London: Croom Helm, 1985. — 311 p. — ISBN13: 978-9401086523.
These stories do not, of course, get us very far in understanding the evolution of tears or anything else, but they do remind us how far the study of behavioural adaptation has come this century. This is, in fact, an exciting time for students of behaviour. The last twenty years have seen a great advance in the theoretical armoury for tackling questions of behavioural evolution and adaptation, and a parallel expansion in empirical studies, particularly in the field. The concepts of inclusive fitness and the evolutionarily stable strategy, for example, have helped to explain major features of social behaviour and have generated entirely new questions and predictions for the field worker to examine.