Looks to me like a Question Mark, Polygonia interrogationis. Note the silver 'question mark' on the underside of the wing, visible in your picture.

Here is a link that might be useful: Question Mark

Yep, that is definitely what it is! Thank you!
It seems its rare for them to be nectaring, as it is claimed they usually only go after rotting fruit and other such things. Its possible they are laying eggs on some nettle we have in our area. There sure seem to be several of them darting all over in the yard, going in the raspberry bushes, oregeno, and now on the lilacs!

Apparently, they visit flowers when other nectar sources like fruit are unavailable.

Here is a link that might be useful: Butterflies and Moths Info on Question Mark

I forgot to mention that there is a huge migration of Red Admirals, Question Marks, Commas, Painted Ladies, and American Ladies this year. I've had several of them visit my garden and fruit feeder.