The non-native nutria has reappeared in California for the first time in more than half a century, and new research indicates that the rodent was likely intentionally reintroduced. The nutria is a large, semi-aquatic rodent with orange teeth. The animal is native to South America and was brought to the United States in the late 1800s for the fur trade, according to the U.S. Department of Agriculture. When demand for fur waned, people released t…