A variety of animals have been found to interact with and manipulate inanimate objects ‘just for fun’, that is, to play. Here, we show that rolling of wooden balls by bumble bees, Bombus terrestris, fulfils behavioural criteria for animal play and is akin to play in other animals. We found that ball rolling (1) did not contribute to immediate survival strategies, (2) was intrinsically rewarding, (3) differed from functional behaviour in form, (4) was repeated but not stereotyped, and (5) was initiated under stress-free conditions
Hiruni Samadi Galpayage Dona, Cwyn Solvi, Amelia Kowalewska, Kaarle Mäkelä, HaDi MaBouDi, Lars Chittka, Do bumble bees play?, Animal Behaviour, m 2022,
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