bees on the melancholy thistle

I am lucky enough to have some bees in my garden this spring.

bee on chive flower

The bees are visiting the green alkanet and nepeta mostly. I've been trying to photograph them but they don't stay still for long - until the melancholy thistle started blooming. The bees stay on the melancholy thistle flowers, even appearing to be asleep in the first photo (purple colour is an effect of the light, the flower is pink like the others).

bee on melancholy thistle flowers top and bottom left