![]() And in Princeton University, evolutionary biologist Daniel Rubenstein and his collaborators are tackling the question using “fly vision in virtual reality”. “It looks as if they cannot recognise that black and white surface as a good landing spot,” says Caro.Ĭaro says his team is working with “lots of unpublished data” from videos of flies approaching different patterns to learn how the stripes mess up a fly’s landing. The flies would try to land on the stripes, but then fail to decelerate as they normally would approaching a non-striped surface, and bounce off. The horseflies hovered around zebras and horses in similar amounts, but far fewer flies landed on zebras – or horses with striped coats. They observed horseflies around zebras and horses some horses had black, white or striped coats placed on them. The research at Hill Livery earlier this year, shed new light for Caro’s team. “We also found absolutely no support for the other hypotheses.” “ really showed something really remarkable to us,” says Caro. While scientists still debate the exact origins and functions of zebra stripes, their recent efforts have focused more closely on three possibilities protection from biting flies, thermoregulation and protection from predators. These striping differences, coupled with the challenges that zebras face in their environment, have guided our understanding of how the stripes might work. Striping patterns and intensity vary across species as well as location. The three living species of zebras that roam eastern and southern Africa with their coat of dark hair broken by stripes of white, unpigmented hair, are the only striped equids. Zebras, together with horses and asses, are members of the Equus genus. But, for a long time new theories were introduced without rigorous tests. Scientists have put forward at least 18 reasons why, from camouflage or warning colours, to more creative explanations like unique markers that help to identify individuals like a human fingerprint. How and why zebras evolved to sport black and white stripes are questions that have tested scientists for over a century. “People have been talking about zebra stripes for over a hundred years, but it's just a matter of really doing experiments and thinking clearly about the issue to understand it better,” he says. IPad 3, iPad 4, iPad Air, iPad iPad, iPad Mini 2, iPad Mini 3, iPad Mini 4, 9.For Tim Caro, an ecologist from the University of St Andrews who has been studying zebra stripes for almost two decades, the livery yard’s relatively tame zebras provided a rare opportunity to stand within metres of them and observe them. ![]() IPhone 12 Pro Max, iPhone 13 Pro Max, iPhone 14 Plus: 1284x2778 IPhone Xs Max, iPhone 11 Pro Max: 1242x2688 ![]() IPhone X, iPhone Xs, iPhone 11 Pro: 1125x2436 IPhone 6 plus, iPhone 6s plus, iPhone 7 plus, iPhone 8 plus: 1242x2208 IPhone 6, iPhone 6s, iPhone 7, iPhone 8: 750x1334 IPhone 5, iPhone 5s, iPhone 5c, iPhone SE: 640x1136 IPhone: iPhone 2G, iPhone 3G, iPhone 3GS: 320x480
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