From the same session as the above, a Hyleaus bee, about 6mm long.
The German name for the genus (a fairly rich one) translates to "mask bee" - referring to the yellow marks on their face. At least the species here all have them, some have a mostly yellow face.
Their bare legs, which first made me wonder what I was looking at, are due to the specialty that Hyleaus bees don't transport pollen externally on their legs, but in a crop. Due to motion blur (shot with available light at 1:1 and 1/400s), it's not very detailed, but you can see how the pollen is brushed off the front leg.