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Mean saliva‐ring diameter of 28 African herbivorous mammals. All species bigger than 3 (>1,000 kg) are considered megaherbivores (listed). Small herbivores, most of which are browsers, are also listed. Purple star = tannic acid, the hydrolyzable tannin that acted as a control. Note that all species had saliva that contained proteins that reduced the diameter of the rings, indicating that they were capable of binding tannins. Some species could bind all tannins (mean value = 0 mm)
