I have never seen another bug or bee like it either. I am about as far from an expert as you can get though. I really liked the fact that it didn't seem aggressive, since we have to be careful because of my husband being allergic. I honestly didn't even know about native bees until last week, when I read an article in our local newspaper about them. I am hoping that this is one of them. I do have lots of honey bees in the veggie garden and on the field mustard, but I will really appreciate native bees for my hillside that I hope to get plants started on.
I will try to get better pictures in the next few days, and some more information on it's size. I didn't even notice this one when I was taking pictures of the flowers.