is triggering early spring across North America and prematurely waking bumblebees from hibernation before flowers have bloomed - leaving many without food and threatening their survival, a new study has found.These insects typically time the end of their hibernation for when flowers are in bloom, allowing them to find an adequate amount of food to replenish what they missed over the winter, but the study found they are waking six to 35 days earlier than ever before.Researchers from the University of Ottawa found climate change is disturbing the slumber of 15 of the 21 bumblebee species across the continent.
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