http://www.sciencemag.org/news/2019/02/top-stories-bees-doing-math-link-between-gut-bacteria-and-mood-and-potato-breeding

Bees ‘get’ addition and subtraction, new study suggests

If math is the language of the universe, bees may have just uttered their first words. New research suggests these busybodies of the insect world are capable of addition and subtraction—using colors in the place of plus and minus symbols. The bees got the correct answer 63% to 72% of the time, depending on the type of equation and the direction of the right answer—much better than random guesses would allow.