A giant, bee-killing insect dubbed the “murder hornet” is making inroads in the United States, threatening crops that depend on pollination, and humans who may get in its way. The Asian giant hornet, Vespa mandarinia, is native to places like Japan, South Korea, and Taiwan, but was detected in Washington state late last year. Canadian officials also found the hornet in British Columbia in August. The menacing orange-and-black hornets have workers that can grow an inch and a half long and queens that get up to two inches in length. They have a painful sting that can be fatal to humans and unlike most bees, hornets can sting more than once.