Mason bee on Wikipedia Image of one of our Mason Bees Link to Mason Bee set (by my son) We are working with Dave Hunter of Woodinville, Washington who is a Mason Bee entrepreneur and a very knowledgeable person on this topic. Genus:Osmia i090514 031
I thought I was taking a picture of a bottle fly and to my surprise when I cropped it, it looks like a bee. It was about the size of a house fly 6-10 mm on a warm and sunny day. 60's.