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

Nature Today Ball-rolling bees reveal complex learning

Do bumble bees play? - ScienceDirect

Wetenschappers geven jonge hommels een paar kralen en zien

We Have The First Evidence of Bumble Bees Playing With Toys, And It's Utterly Adorable : ScienceAlert

Bumblebees 'play' just like kids, groundbreaking study reveals

Bumblebees Have Poor, but Useful Memories - Neuroscience News

Bumblebees Have Collective Intelligence; Insects Can Teach Others to Retrieve Sugary Treat [Study]

Bumblebees Like Playing With Toys, Study Finds

What We Still Don't Get About Bees