
Scientists painted black cows with white stripes to test whether zebra markings deter biting flies — and the painted cows drew 50 per cent fewer flies, adding weight to the theory that zebras evolved their colouring not for camouflage or heat, but as a living insect repellent
Researchers in central Japan painted plain black cows with white stripes, stood them in a pasture, and photographed the flies that landed on them.














