https://www.theguardian.com/technology/2019/feb/10/five-smart-things-honeybees-can-do

Last week, Australian scientists announced that honeybees (Apis mellifera) can learn to add and subtract. Fourteen bees were put through 100 training exercises in a maze – and got the correct answer between 64% and 72% of the time. “It is not that every bee could do this [spontaneously], but we could teach them to do it,” said Dr Adrian Dyer, co-author of the research.