在世界的部分地方，美洲虎与美洲豹通体都是黑色，这种适应色好像只在某些生活在各种不同的栖息地的动物身上出现。
In some parts of the world, jaguars and leopards are completely black, an adaptation that only seems to arise in species that live in a diverse range of habitats.
在世界的部分地方，美洲虎与美洲豹通体都是黑色，这种适应色好像只在某些生活在各种不同的栖息地的动物身上出现。
In some parts of the world, jaguars and leopards are completely black, an adaptation that only seems to arise in species that live in a diverse range of habitats.
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