Garden: Mining Bee on Yarrow

Even buzzier in large

I just took macro photos in the garden today...
Mum recently got this vibrant Achillea and today I finally spotted something other than a blowfly on it. 
I saw a leafcutter bee cutting leaves, but it was in a dark corner of the garden and hard to photograph, and I also found a chafer stuck in a spider web, but it was (even) harder to get a decent angle on.

Others here (or right from Tiny halictid)