Birds see colours in their own way, because they are sensitive to wavelengths, such as ultra-violet, that are invisible to people.

鸟类能以它们自己的方式来辨别颜色，因为它们对波长(例如紫外线)具有敏感性。这些波长对于人类来说是看不见的。

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Birds see colours in their own way, because they are sensitive to wavelengths, such as ultra-violet, that are invisible to people.

鸟类能以它们自己的方式来辨别颜色，因为它们对波长(例如紫外线)具有敏感性。这些波长对于人类来说是看不见的。

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