Paul L. Vasey is Associate Professor in the Department of Psychology Neuroscience at the University of Lethbridge, Alberta, Canada.
Volker Sommer is Professor of Evolutionary Anthropology in the University of London.
Part I. Introduction: 1. Homosexuality in animals. Topics, hypotheses, and
research trajectories Volker Sommer and Paul L. Vasey; Part II.
Non-primates: 2. Making the best of a bad situation. Homosociality in male
greylag geese Kurt Kotrschal, Josef Hemetsberger and Brigitte Weiss; 3.
Pink flamingos. Atypical partnerships and sexual activity in colonially
breeding birds Catherine E. King; 4. Establishing trust. Sociosexual
behaviour and the development of male-male bonds among Indian Ocean
bottlenose dolphins Janet Mann; 5. Going with the herd. Same-sex
interaction and competition in American bison Hilde Vervaecke and Catherine
Roden; 6. Exciting ungulates. Male-male mounting in fallow, white-tailed
and red deer Ludek Bartos and Jana Holeckova; 7. Frustrated felines. Sexual
mounting between males in feral cats Akihiro Yamane; Part III. Primates: 8.
The pursuit of pleasure. An evolutionary history of homosexual behaviour in
Japanese macaques Paul L. Vasey; 9. Getting to know you. Female-female
consortships in free-ranging rhesus monkeys Ellen Kapsalis and Rodney L.
Johnson; 10. A wild mixture of motivations. Same-sex mounting in Indian
langur monkeys Volker Sommer, Peter Schauer and Diana Kyriazis; 11. Playful
encounters. The development of homosexual behavior in male mountain
gorillas Juichi Yamagiwa; 12. Social grease for females? Same-sex genital
contacts in wild bonobos Barbara Fruth and Gottfried Hohmann; 13. The
evolution of male homosexuality and its implications for human
psychological and cultural variations Dennis Werner; Part IV. Outlooks:
Science and Beyond: 14. Where do we go from here? Research on the evolution
of homosexual behaviour in animals Paul L. Vasey; 15. Against nature?! An
epilogue about animal sex and the moral dimension Volker Sommer;
Acknowledgements.
