Forest cuckoo bumblebee

Bombus sylvestris

''Bombus sylvestris'', known as the forest cuckoo bumblebee or four-coloured cuckoo bee, is a species of cuckoo bumblebee, found in most of Europe and Russia. Its main hosts are ''Bombus pratorum'', ''Bombus jonellus'', and ''Bombus monticola''.

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