Seattle, King County, Washington, USA August 9, 2006
I was watching Green Metallic Bees and waiting for one to stop moving for a moment when this guy came by. I wasn't sure it was even a bee until I was looking at this guide and saw one from Victoria, BC. It would be really cool if someone could ID it, but I realize that the photos aren't really that clear (and I don't remember how big it was).