Dark-tinged wings, female with a single yellow stripe on thorax, tail white with small yellow side patches
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Nice photos of this cuckoo bee. I find it very hard to distinguish Bombus bohemicus from Bombus vestalis (vestalis seems to be much commoner in southern England), so I'm not able to confirm which species it is. What made you decide on B. bohemicus?
Entomologist and biological recorder
Lat/Lng: 51.7, -2.6
OS grid ref: SO6208