Sexual dimorphism
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Sexual dimorphism is the systematic difference in form between individuals of different sex in the same species. Examples include size, color, and the presence or absence of parts of the body used in courtship displays or fights, such as ornamental feathers, horns, antlers or tusks.
Sexual dimorphism is present in all extant apes to varying degrees with chimpanzees and humans showing very little and gorillas displaying the most extreme amount, especially in size. Most people theorize that sasquatches likely display a moderate amount of sexual dimorphism with at least slightly larger males.
