Geladas are the only graminivorous (grass-eating) primates. Over 90% of their diet is made up of grass blades and they have highly opposable thumbs and dexterous index fingers to help them pluck the grasses they eat.
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Geladas are the only graminivorous (grass-eating) primates. Over 90% of their diet is made up of grass blades and they have highly opposable thumbs and dexterous index fingers to help them pluck the grasses they eat.