JOHANNESBURG, South Africa – Chinese workers in Zimbabwe are buying up the local wildlife for dinner, feasting on endangered tortoises, pythons, leopards — and even village dogs. Viewed as prestigious dishes, they would be expensive to serve at banquets back in China. But in Zimbabwe they are relatively cheap. Worse yet, in this cash-strapped country there’s a lack of resources to thwart the appetite for endangered game, conservation groups say. China is investing significantly in mining, agriculture and construction, and its companies bring along thousands of workers. Where there are Chinese in Africa, illegal trade in rare animals inevitably increases,...