Parasites fail to halt European bumblebee invasion of the UK

A species of bee from Europe that has stronger resistance to parasite infections than native bumblebees has spread across the UK, according to new research. The study shows that tree bumblebees have rapidly spread despite them carrying high levels of an infection that normally prevents queen bees from producing colonies. The species arrived in the UK from continental Europe 13 years ago and has successfully spread at an average rate of nearly 4,500 square miles -- about half the size of Wales -- every year.

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