Some honeybees in Italy regularly steal pollen off the backs of bumblebees

Honeybees rely on plant pollen as a protein-packed food source. And some are even willing to steal from other bees to get it.On a summer trip in 2019 to Mount Antola, in the northern Italian region of Liguria, independent naturalists Tiziano Londei and Giuliana Marzi, both based in Milan, recorded video of what they thought were honeybees . A closer look at the video, however, revealed that this wasn’t a case of competitive harassment — it was a full-blown robbery. ).

“Honeybees are well-known as pollen pigs,” says Avery Russell, a biologist at Missouri State University in Springfield who was not involved in the study. So stealing pollen from the bodies of bumblebees, he says, “doesn’t seem like a far stretch.” To see how common the criminality is, the researchers went back to the scene twice in the following three years and also observed bees at two other sites about 25 kilometers away. Honeybees at these other sites were not seen stealing from bumblebees, but bees at the first site continued their larcenous ways year after year. For instance, honeybees collected pollen from only three of the 31 flowers the researchers observed in 2021, but stole from 28 of the available 66 bumblebees.

Scrutinizing the differences between these sites, the researchers suspect honeybees resort to theft in areas where pollen is hard for them to get from flowers , but where there are plenty of other bees around.. Discovering the behavior in Italy suggests this may be a global crime spree. Russell says it would be nice to next learn whether pollen theft negatively impacts bumblebees, or the flowers they pollinate. He’s also curious if other bee species ever steal pollen, too.

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