As with butterflies, the trick is to get as close as you can, as quietly as you can, and don't let your shadow fall on the insect, that seems to scare them more than anything. But, be prepared to be frustrated. A lot.
I'm no expert in identifying bumblebees, but I think the dark bee below may be a field cuckoo bumblebee male, which is a more uncommon specimen of these big buzzers!
|First up, a honey bee of some kind|
|Field cuckoo bumblebee, male, I think|
|Magnficent garden bumblebee queen|
|Fabulous detail in this garden bumblebee shot|