Perry and the other researchers from Queen Mary University of London didn't exactly find that bees have emotions, but they found that they have some criteria for them. It's so complex that Perry said we can't even subjectively say whether humans have feelings without a verbal report. Judgment bias and attack testsThe two main tests were what Perry called a judgment bias test and a simulated predator attack test. Then the researchers introduced a blue and green flower — meaning it would be ambiguous to the bees. The bees that got the sugar flew more quickly to the ambiguous flower than the ones that had nothing before the test.

Source: CBC News September 29, 2016 18:00 UTC