Aborted buds could be from thrips. They can also leave silvery streaks on leaves but that may vary by species. The ones that cause the damage here, though, are more solitary and secretive, hiding out of view for the most part. I haven't often seen them all over like yours. Trouble is they could also be "accidental" visitors attracted by the yellowy flower and then finding it wasn't right for them. If they're not there tomorrow then it's probably the latter. If they're still there I might be a bit more concerned.
You only need to do any treatment if they persist and seem to be causing unacceptable amounts of damage. Thrips can also be fungus feeders although in that case I'm not sure why they would be hanging out on a flower.
Since they're more accessible than the sneakier thrips you could try insecticidal soap. Another option, without going for "chemical" pesticides, could be spinosad. If they don't seem to be causing any damage then you don't need to do anything.