A team of researchers from ETH Zürich and the Universite Paris-Saclay made observations suggesting that bumblebees have strategies to cope with irregular seasonal flowering: when faced with a shortage of pollen, bumblebees actively damaged plant leaves and this behavior resulted in earlier flowering by as much as 30 days.
Nature: Bumblebees' 'clever trick' fools plants into flowering
Pollen-deprived bumblebees bite leaves and may speed up plant blooms
Pollen carriers hi-res stock photography and images - Alamy
Bumblebees may bite leaves to spur plant blooming
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Nature: Bumblebees' 'clever trick' fools plants into flowering - BBC News
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Bumblebees Bite Leaves of Flowerless Plants to Stimulate Earlier Flowering, Biology
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Bumblebees Bite Plants to Force Earlier Bloom
Pollen-deprived bumblebees bite leaves and may speed up plant blooms