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any animals, including some mammals and birds, are known to avoid power lines in remote regions. Now scientists propose that this behaviour may result from the sensitivity of some Arctic animals' eyes to ultraviolet (UV) light emitted from the cables.

Although some humans may find power lines and pylons aesthetic eyesores, the huge flashes of UV light they emit are beyond the limits of human vision.  However, to animals that can see in this visual range, power lines and pylons appear as “horrendous” structures sending “massive flashes across the sky”, says Glen Jeffery, a neuroscientist at the Institute of Ophthalmology at University College London.

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