We have a Barberry in our back garden which seems to be incredibly good for bees! I have recorded 9 bee species on it so far: Buff-tailed Bumblebee; White-tailed Bumblebee; Garden Bumblebee; Common Carder Bee; Tree Bumblebee; Early Bumblebee; Honey Bee; Yellow-legged Mining Bee and, my favourite, a Tawny Mining Bee just yesterday!
I have caught most of them (except the White-tailed Bumble and the Tawny Mining) in a specimen pot I have now christened my ‘bee pot’. I catch them by holding the lid and the pot of opposite sides of the flower, and bringing them closer together. As they get closer I tilt the pot slightly downwards so that when the bee notices that it’s about to be caught it flies down and into the pot. I then quickly close the lid and take a photo through the bottom, like so: