Snowdrops produce a lot of pollen and the bees get plastered in it. As a result they have to spend a lot of time cleaning up. The photos and videos provide an opportunity to see how they do it, typically hanging from a flower by one front foot and using the other five legs to move the pollen back and stow it in the corbiculae.
Here are a couple of videos.
When all is done they fly back to the hives to unload - only a few metres away.