Walking through a park or a city street in early summer, you may have come across a strange scene: a large number of dead bumblebees under a lime tree. This event, which often causes surprise and concern, raises many questions. What exactly happens to the bumblebees under these trees?

The linden tree and its blossoms

The linden is a popular tree in urban environments, valued for its fragrant flowers that are a rich source of nectar for many pollinators, including bumblebees. The flowering time of the linden usually falls in late spring to early summer and the sweet scent of the flowers attracts countless insects. For many bumblebees, linden nectar is an important source of food.

Image of Jana Illnerova via Public domain Picturesnet

The death of the bumblebees

Nevertheless, there are often reports of dead bumblebees under lime trees. Several factors contribute to this phenomenon:

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