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Sex Roles in Primate Relatives
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Common Chimpanzees Pan troglodytes
Live in tropical Africa Have estrus and menstruation monthly Females choose mating partners May form consort relationships briefly during estrus Live in matrifocal groups Mothers nurse for 5 years Mothers and children have lifelong relationships Siblings have lifelong relationships
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Bonobo Chimpanzees Pan paniscus
Walk upright more Use sexual behaviors to comfort or to resolve conflict Display all types of homosexual and heterosexual behaviors Matrifocal groups Same lifelong mother-child and sibling relationships
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Bonobo Male Grooming Female
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Upright, Bipedal Bonobo Carrying Sugar Cane
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Bonobo Relaxing
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Bonobo Female Stretching
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Bonobo Intercourse in Missionary Position
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Bonobo Intercourse in Missionary Position
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Bonobo Females “GG Rubbing”
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Bonobo Males “Rump-Rubbing”
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Bonobo Female Masturbating
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Bonobo Male Display
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Bonobo Baby
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Bonobo Mom and Baby
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Bonobo Mom and Baby Playing
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Bonobo Matrifocal Group
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