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Diet
Folivory
- Primarily eats vegetation, such as leaves, buds, and pith
- Does not eat meat
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Locomotion
QuadrupedalÂ
Knuckle-walking on the ground
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Morphology
- Arms longer than legs
- Broad thorax
- Mobile, flexible wrist
- "stiff back" (few lumbar vertebrae)
- no tail
- dental formula 2,1,2,3/2,1,2,3
- Y-5 cusp pattern on lower molars
- marked sexual dimorphism in body size
- prominent sagittal crest
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Mating behavior
One-male polygyny, with one adult male and several adult females and juveniles
Single adult male in social group is the silverback
- Both M and F emigrate from their birth troopÂ
- Not terriorial
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Tool use
No reported use of tools
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