Bald uakari, the Amazon monkey with a bright red face, gets its color from blood vessels, not pigment
The bald uakari's scarlet face comes from blood vessels under pigment-free skin, and a paler face can mean this Amazon monkey is sick or stressed.
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The bald uakari's scarlet face comes from blood vessels under pigment-free skin, and a paler face can mean this Amazon monkey is sick or stressed.
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