在那里，身高的优势和极好的视力能让它们尽早发现天敌。
They live in lightly wooded bush and grassland in eastern Africa where their height and excellent vision help them to spot predators.
以前在骨头上发现的牙印，大部分不是攻击性天敌留下的猎伤就是食腐动物在其死后撕扯的痕迹。
Tooth marks on bones have been found before, but often as damage left by attacking predators or scavengers that tore at the carcass after the animal died.
她指出蛇是早期灵长类动物的第一天敌，并导致了人类对蛇的相对敏感的视觉系统进化 -- 这样可以快速的发现蛇类 --这使得我们今天仍可以受益 。
She figures snakes were the first predators of early primates and contributed to the evolution of relatively good vision — useful for spotting snakes — that we enjoy today.
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