这让驯鹿可以踩进冰雪,不会溜滑。此外,驯鹿还会用蹄子在雪中挖掘他们最喜欢吃的食物--驯鹿苔。
The vision of reindeer may also outperform a snowmobile’s lights, because the animals can see ultraviolet light.
除此之外,驯鹿的视力也远远超过雪地摩托的灯光,因为驯鹿能够看到紫外光。
Snow reflects up to 90 per cent of UV light and this ability helps the animals to see clearly in dim lighting and landscapes that are largely white, where may objects blend unto the landscape.
由于雪地会反射90%的紫外光,即便在昏暗的照明条件下,只要地面上白色部分较多,驯鹿就能看得一清二楚。
Things like fur and urine, for example, show up clearly in ultraviolet light, compared to what humans see.
毛发和尿液等物体在紫外光照射下比人用眼睛直接看更加显眼。
A study by University College London (UCL) revealed in 2011 that reindeer can see light with wavelengths as short as 320 nanometres (nm), considerably below the human threshold of 400 nm.
伦敦大学学院在2011年的一项研究中发现驯鹿眼睛能感知到波长最短为320纳米的电磁波,这大大小于人类所能感知到的最短波长400纳米。
Researchers from the University of Tromsø discovered that the eyes of reindeer change colour according to the seasons too.
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