We had evidence that bees could count up to four. But it seems they can go further – if prompted with both rewards for correct answers and penalties for errors
Source:
https://www.newscientist.com/article/2219321-bees-are-better-at-counting-if-they-are-penalised-for-their-mistakes/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home