I'm not completely sure which species of crescent butterfly this is, but I think it might be a Pearl Crescent.
When I first saw it, I thought it was a Skipper because it was tiny and orange, but then it perched and opened its wings and I saw the markings. It looks a lot like a Northern Crescent, but it was so small compared to the Northern Crescents I'm used to, and I understand that Pearls and Northerns can be very hard to differentiate.
A very belated welcome to 365 - the friendliest site on the internet. What a neat shot you got of this crescent - I tried checking it out in my guide, but wasn't positive either. Whatever, it sure is a clear shot.