First-ever study shows bumble bees 'play' - Queen Mary University of London

Bee Ball - Science Update

Bumble bees can teach each other to solve problems - study - The Jerusalem Post

Plight of the bumblebee: how Queen Mary helped Britain's native

Bees learn new tricks from one another in world-first for insects - ABC News

Bumblebees get a buzz out of playing with balls, study finds

Study finds that bumble bees choose to 'play

bumble bees can 'play' like animals, new study shows

Bumblebees go out of their way to play

First-ever study shows bumble bees 'play' - Queen Mary University of London

Bees rolling balls around hailed as first evidence of insect play

Bumblebees 'play' just like kids, groundbreaking study reveals

Bumblebees learn to solve puzzles by watching peers, study finds

Bees like to roll little wooden balls as a form of play, study finds