March 2014: Animals avoid areas with high-voltage power cables because they see a worrying series of flashing UV lights, not visible to humans, new research shows. Scientists have wondered for years why mammals and birds avoid power lines has puzzled scientists for some time as they do not pose a barrier or are regularly associated with humans.
Professor Glen Jeffery of university College of London said: "Animals avoid man-made structures and, in the case of high voltage power lines, this can be by several kilometres. This is perplexing because the suspended cables are neither a physical barrier nor are associated with human activity.
"New information about animal vision along with the characteristics of power lines provides strong evidence that the avoidance may be linked with animals' ability to detect ultraviolet flashing on power lines that humans cannot see and which they find frightening."
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