A new study finds that 478 were killed by hornets, wasps or bees between 2008 and 2015. That's 29.7 percent of the 1,610 reported people killed by animals during that period. However, they are not the deadliest group of animals from the study. That honor goes to pigs, cows, and horses. Science Alert says “farm animals” were responsible for 576 deaths or 36 percent of animal-caused deaths in the timeframe.