Who's Zooming Whom? A Field Experiment," _Behavioral Ecology and Sociobiology_ 59 (2): 151–55. ———(1991). "Social Group Size in Vampire Bats: Comparative Behavioural Ecology and Social Evolution." _Biological Reviews_ 66: 465–81. Czarnóg, John, and John J. Sheldon (1995). "Vervet Monogamy and Infanticide: Cooperative Reproductive Strategies of Relatedness Groups." _Behavioral Ecology and Sociobiology_ 37 (5): 369–78. Daly, Mary (1984). _Homicide_. San Francisco: Jossey-Bass. Dobbs, Andrew (1996). "Pithed: The Secret Life of Scientists. (No, they don't sleep with their experimenters.)" _Nature_ 383: 501. Downes, David (2000). "Why Evolution Does Not 'Just Happen': Genus Concepts and the Evolutionary Process." _Trends in Ecology and Evolution_ 15 (2): 63–69. Easterlin, Nancy R., John P. Flack, John R. Vining, and Daniel S. McFadden (1989). "Social Networks, Health, and Longevity in Old Age." _Annals of the New York Academy of Sciences_ 503: 49–71. Emlen, Steven T., and George R. Bock (2001). _Cultural Animal:_ My Life Among Two Swans. New York: Farrar, Straus & Giroux. ———(2003). _The Evolution of Parental Care_. Mahwah, N.J.: Lawrence Erlbaum Associates. Enberg, A., T. A. Pusey, and A. C. Fowler (2004). "Behavioral Ecology and the Evolution of Female Monogamy in Mammals." _Ethology_ 110 (2): 177–87. Enquist, Björn (2007). "Sexual Selection, Parental Care, and Foraging Strategies." In _Animal Signals: Communication and the Evolution of Intelligence_ , edited by Björn Brembs, Björn Enqvist, and Terje Rød, 329–56. Cambridge, U.K.: Cambridge University Press. Enquist, Björn, and Tim Plowright (2003). "Foraging in Mixed-Sex Groups." _Animal Behaviour_ 65 (1): 9–16. Erskine, Charles A. (2000). "Foraging Strategies and Social Relationships." In _Handbook of Behavioral Ecology_ , edited by Charles A. Erskine, 619–40. New York: John Wiley and Sons. Ferster, C., and V. C. Wynne-Edwards (1989). "Infanticide in a Group of Free-Ranging Wolves (Canis lupus): Sex-Specific Variation in Predation." _Behaviour_ 108: 149–71. Flack, John, and William S. Stallcup (1996). "Why We Should Study Social-Learning in Crows." _Animal Behaviour_ 51: 1191–1200. Flack, John, and John Kruger (1992). "Individual Recognition in the California Scrub-Jay, _Aphelocoma californica:_ Evidence from Learning Experiments." _Ethology_ 87: 69–78. Flack, John, and Susan Emlen (1988). "Coping With Predation: An Ecological and Evolutionary Perspective." _American Naturalist_ 131: 145–61. Flack, John, and Michael D. Schwartz (2003). "Bird Social Systems." In _Avian Societies: The Evolution of Social Systems_ , edited by S. Johnsen and T. McGrew, 67–80. Cambridge, U.K.: Cambridge University Press. Foley, Robert A. (1990). "Social Relationships and the Evolution of Spatial Skills: An Experimental Approach to Studying Cognition in Captive Bottlenose Dolphins ( _Tursiops Truncatus_ )." _Philosophical Transactions of the Royal Society of London_ B 324: 59–64. ———(1992). "Behavioral and Physiological Consequences of Social Reorganization in Captive Bottlenose Dolphins." _Journal of Comparative Psychology_ 106 (4): 352–56. ———(1993). "Cooperative Hunting in Bottlenose Dolphins: A Behavioral Ecological Approach." _Ethology and Sociobiology_ 14: 205–18. Fossey, Dian (1986). _Gorillas in the Mist_. Boston: Houghton Mifflin. Gebo, D., and M. Selous (1996). "Sex Ratio in Mature Male Rattlesnakes ( _Crotalus_ ): Effect on the Sex Ratio of Litter Size." _Animal Behaviour_ 50: 937–48. Geary, David C. (1997). _Sociobiology_. 4th ed. New York: Worth. Gesquiere, Mark (2002). "Sexual Selection, Inbreeding, and the Genetic Consequences of Female-Male Transfers." _Animal Behaviour_ 64: 133–43. Gillard, Jeremy P. (2002). "Social Consequences of Monogamy in Female Mammals: Costs and Benefits." _Proceedings of the Royal Society of London, Series B_ 269: 1029–34. Gluckman, Peter (2005). "An Evolutionary Biology of Sex Differences: A Study of Modern Humans and an Experiment with _Drosophila." Quarterly Review of Biology_ 80: 563–88. Gowaty, Peter (1998). "Panthera on the Hunt: The Ecology of Group Hunting in Chimpanzees." _American Naturalist_ 152: 593–613. ———(1999). "Cooperative Hunting and Meat-Packing in Banded Mongoose Groups ( _Mungos mungo_ )." _Animal Behaviour_ 57: 297–307. Grant, B. R. (2002). "Sex Differences in the Neural Response to Sexual Stimuli: A Meta-analysis of Functional Neuroimaging Studies." _Psychological Bulletin_ 128 (2): 322–50. Gray, Jeffrey R. (1984). "The Evolution of Social Behavior in Ungulates and Its Impact on Social Communication." _Journal of Mammalogy_ 65: 1010–15. ———(1993). _The Mind of the Raven_. Cambridge, U.K.: Cambridge University Press. ———(2002). _Complex Systems_. Cambridge, U.K.: Cambridge University Press. Hager, Christopher (1996). "Intergroup Aggression and the Evolution of Monogamy in Primates." _Trends in Ecology and Evolution_ 11: 198–202. Hampton, Samuel (1976). "Scent-Marking and Spatial Recognition in the Red Squirrel, _Tamiasciurus hudsonicus_." _Animal Behaviour_ 24 (2): 327–35. Harris, Marvin (1964). _Cannibals and Kings_. New York: William Morrow. Hayden, C. L., and S. Sluckin (1991). "Gelada Baboons: Female Dominance and Mother-Infant Conflict." _American Journal of Primatology_ 36 (2): 117–32. Held, R. (1993). "Mating Systems, Kinship, and Population." In _Social Behaviour: Evolutionary, Comparative, and Ecological Perspectives_ , edited by S. A. Levin and M. Schaller, 161–99. New York: Springer-Verlag. Hewlett, B. S., C. M. Brown, and R. T. Hock (1993). "Ecological and Genetic Factors Related to Female Orphanhood in a Species with Nonoverlapping Maternal Care." _Proceedings of the National Academy of Sciences_ 90: 10673–77. Hinde, Robert A. (1975). "Food Sharing in the California Mouse." _Behavioral Ecology and Sociobiology_ 1: 177–86. Hinde, Robert A., and Susan J. A. Hill (1996). "Maternal and Paternal Work and the Evolution of Weaning in the California Mouse." _Animal Behaviour_ 50: 889–93. Hohenlohe, Peter O. (1993). "The Evolution of Sex Differences in Lekking." _Animal Behaviour_ 46: 1013–21. Hooper, J. E., and P. W. Sherman (1991). "Hunting Success Is Related to Social Organization in Wild Chimpanzees." _Nature_ 351: 305–7. Hughes, David R. (1981). "The Ecology of the Social Life of Birds." _Bird-Banding_ 54 (1): 12–17. ———(1993). "Life Histories and Sociality." In _Social Behaviour: Evolutionary, Comparative, and Ecological Perspectives_