アメリカ自然史博物館のインスタグラム(amnh) - 12月4日 14時50分

Did you know caribou are able to see light wavelengths around 350-320 nanometers, well outside of the so-called visible spectrum? The ability to see the shorter wavelengths gives caribou an important advantage in their harsh environment: it allows them to spot lichens, which absorb UV light and appear black in a sea of highly reflective snow. That’s a big lead in the quest for a meal—an important part of surviving the Arctic.
Photo: Natalia_Kollegova
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