BUZZ, BUzz, buzz...

Thank heavens the wildlife in my front yard is much smaller!
They're busy working those azaleas and rhodos for all they're worth, but I'm not sure who they all are. I recognize the regulars - bumblebees, wasps, black flies. This year, however, there's a new guy in town. He (she?) looks the size of a bumblebee, is just as furry, but has different colours. The head is light brown, the thorax black, but end section of the abdomen is orangey-brown. I don't think he's a mason bee, though we did build a small hotel for the masons out back. So I'm calling him (her) my "orangey-bum bee" until I find a proper name.
This picture (you can just see him in the middle) doesn't show him well, as my little digital camera cannot get close enough without alarming him. I thought about trying to catch him in a jar, then cool him off in the fridge, as suggested on some sites as the best way to photograph small insects. Decided not to - after all, he is working.
If my drawing skills were better, I would try to sketch him. I greatly admire the skills of Valerie Littlewood, who shares her fantastic pictures of bees and flowers on her blog "Pencil & Leaf". I have been checking out her bees pics at pencilandleaf.blogspot.com/
As she is based in Florida, I have not found a match for my little worker.
I also checked the Xerces Society site,www.xerces.org/bees/, as they have lots of info about bees, but couldn't find a match.
I'll keep looking, and watching these little guys, and leaving them bee.