Dittus has contributed to many documentary films in international television about the fascinating phenomenon of primate societies. Personal Life Wolf Dittus, has two children Thomas and Tatiana, and continues to live and work in Sri Lanka. Publications and co-publications 1. Dittus, W. P. J. and Lemon, R. E. 1969. Effects of song tutoring and acoustic isolation on song repertoires of cardinals. Animal Behaviour 17, 523-533. 2. Dittus, W. P. J., 1974. The ecology and behavior of the toque monkey, Macaca sinica. Ph.D. Thesis, University of Maryland, Maryland; 55+127+56 pp. 3. Ekanayake, D.K., Welch, R.K., Kieft, R., Hajduk, S. & Dittus, W.P.J. 2007 . Transmission dynamics of Cryprosporidium infection in a natural population of non-human primates at Polonnaruwa. American Journal Tropical Medicine and Hygiene 77(5), 818-822. 4. Dittus, W.P.J. 2004. Demography: a window to social evolution; pp 87–116 in (Thierry, B., Singh, M. & Kaumanns, W., eds.): Macaque societies: A model for the study of social organization, Cambridge University Press, Cambridge. 5. De Silva, A.M., Dittus, W.P.J., Amerasinghe, P.H., et al. 1999. Serologic evidence for an epizootic dengue virus infecting toque macaques (Macaca sinica) at Polonnaruwa, Sri Lanka. American Journal of Tropical Medicine and Hygiene 60(2), 300-306. 6. Dittus, W.P.J. 1998. Birth sex ratios in toque macaques and other mammals: integrating the effects of maternal condition and competition. Behavioral Ecology and Sociobiology, 44: 149-160 . 7. Keane, B., Dittus, W.P.J. and Melnick, D.J. 1997.Paternity assessment in wild groups of toque macaques (Macaca sinica) at Polonnaruwa, Sri Lanka using molecular markers. Molecular Ecology 6(3): 267-282. 8. Hoelzer, G. A., Dittus, W. P. J., Ashley, M. V. et al. 1994. The local distribution of highly divergent mitochondrial-DNA haplotypes in toque macaques (Macaca sinica) at Polonnaruwa, Sri Lanka. Molecular Ecology 3(5), 451-458. 9. Cheverud, J.M., Wilson, P. and Dittus, W.P.J. 1992. Primate population studies at Polonnaruwa. 3. Somatometric growth in a natural population of toque macaques (Macaca sinica). Journal of Human Evolution 23(1), 51-77. 10. Cheverud, J.M. and Dittus, W.P.J. 1992. Primate population studies at Polonnaruwa. 2. Heritability of body measurements in a natural-population of toque macaques (Macaca sinica). American Journal of Primatology 27(2), 145-156. 11. Dittus, W. P. J. 1987. Group fusion among wild toque-macaques - an extreme case of intergroup resource competition. Behaviour 100, 247-291. 12. Dittus, W.P.J. 1986. Sex-differences in fitness following a group take-over among toque macaques - testing models of social evolution. Behavioral Ecology and Sociobiology 19(4): 257-. 13.