Low-light conditions, a bit blurred. Was fascinating to see, as it iterated over multiple target apids and stabbed them all. Aphids didn't even attempt to run. Interestingly, only chose small aphids, even a very small one (seen in this photo at the lower left, near the posterior tip of the wing of the wasp).
Another unusual insect: Tenthredo baetica (ssp. dominiquei), with only 118 observations world wide, of which 29 for this particular subspecies. It's a wasp – sort of: a sawfly.
The rear limbs are rather large, and I wonder why. For carrying prey?
Wikipedia points out an interesting reversal: in the Tenthredo genus, the larvae eat plants while the adults prey on other insects. Whereas many typical wasps do the opposite: the adults sip nectar but hunt insects to feed their young. https://en.wikipedia.org/wiki/Tenthredo One wonders then what is this adult doing on a flower, engaging in motion patterns characteristic of foraging on nectar and pollen.
"The nesting habits of many Osmia species lend themselves to easy cultivation, and a number of Osmia species are commercially propagated in different parts of the world to improve pollination in fruit and nut production. Commercial pollinators include O. lignaria, O. bicornis, O. cornuta, O. cornifrons, O. ribifloris, and O. californica. They are used both as an alternative to and as an augmentation for European honey bees. Mason bees used for orchard and other agricultural applications are all readily attracted to nesting holes – reeds, paper tubes, nesting trays, or drilled blocks of wood; in their dormant season, they can be transported as intact nests (tubes, blocks, etc.) or as loose cocoons."