I was poking around in the garden yesterday, looking for signs of life... and I found one! Several, actually. Not the type I was expecting, but it was sure a nice surprise to see butterflies flitting about so soon after all that snow.
... hundreds of thumbnails later, I may have found it! I think it's a Mourning Cloak butterfly (Nymphalis antiopa). I sent my photo and sighting info to the state coordinator at the site, so we'll see if I get a for-sure confirmation. Looks pretty close, though -- only mine's prettier. lol Amazing how easy it is to get completely sidetracked with a thing like this!