I didn't want to hijack the awesome pic-of-the day thread but we are seeing a lot of bees we have never seen before. We always have honeybees, carpenter bees, bumble bees, etc. but this year we have something new, a honeybee-sized flyer that is solid black when viewed from the top, but has deep gold on the underside of the lower wing or belly (sorry I can't be more specific, they move very fast). These black bees, as we call them, feed side-by-side with traditional honey bees on the oregano, basil, and rosemary; no hostility or territorial behavior between them or towards us. If anything they are more passive than the honey bees who sometimes get a little cranky when I trim in the garden. I've googled without success; any ideas?