Recording of the “whoop” here: www.newscientist.com/article/2121275-honeybees-let-out-a-whoo
Recording of the “whoop” here: https://www.newscientist.com/article/2121275-honeybees-let-out-a-whoop-when-they-bump-into-each-other/ -- source link
Recording of the “whoop” here: https://www.newscientist.com/article/2121275-honeybees-let-out-a-whoop-when-they-bump-into-each-other/ -- source link