I got a close look at one of those dark butterflies which have been hanging about lately. It landed right next to me for a moment. It's forewing is black, but the hind wing is an irridescent blue-green on top, with a trim of grey spots, and black with orange spots on the underside. I tried looking for it at the USGS butterfly site, but couldn't find it. I also checked some nice butterfly photographs by photographer Jay Cossey, but it wasnt there, either. Then I tried another site, that lets you search for butterfles based on the sources of nectar they prefer. Nope, not there. But now I know that there are a lot of butterfly sites out there!