Bumblebees Solve Ball Puzzle for Sugar in 73% of Trials, Study Finds

Q: Is a bee pushing a ball true problem-solving, or just an instinct leftover from foraging in complex flowers?

It is best described as genuine problem-solving, though likely built on cognitive skills bees already use while foraging. The strongest evidence is that most of the bees solved a novel task without being trained in the key action. In the study, 73 percent of fully naïve bumblebees pushed a ball under an out-of-reach target and climbed it to get sugar. Researchers say the bees had never been taught to roll the ball or use objects as platforms, which argues against a simple fixed instinct. The follow-up experiment also matters. When the target’s location was hidden, 23 of 30 bees still moved the ball to the correct place. That suggests memory, spatial representation and goal-directed action, not just a reflex to a visible cue or random manipulation. The researchers described the bees’ behavior as decisive and flexible, hallmarks of problem-solving. At the same time, scientists and outside experts caution that this does not mean bees are reasoning like humans. Bumblebees already solve difficult natural tasks: they learn flower shapes, optimize foraging routes and sometimes switch tactics, such as nectar robbing, when it is more efficient. Those evolved abilities may provide the mental framework that lets them handle an artificial challenge like the ball task. So the fairest reading is that the behavior is not “just instinct,” but neither is it proof of human-like insight. It is a strong sign that bumblebees can flexibly apply existing cognitive tools to a new problem.

3 articles · Updated · CBC Sports · Jun 8

73% of bumblebees pushed a ball under an out-of-reach target and climbed it to reach sugar, solving the task without prior training on that solution.
Science-published researchers say the result shows spontaneous problem-solving in insects, a cognitive ability more often linked to large-brained vertebrates such as chimpanzees and elephants.
23 of 30 bees still moved the ball to the correct side after the target was made invisible with red light, indicating they remembered the reward location rather than acting randomly.
Researchers and outside experts said the lab result fits real-world bee behavior, where foraging and navigation demand learning and memory, and could strengthen arguments to protect bees from pesticide-related harm.