Post on 03-Jan-2016
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Common ChimpanzeesPan 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
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