Photo: Diane Edwardson, May 10, 2011. According to UC Irvine, this is a Mourning Cloak Butterfly. (Click on photo to enlarge.)
Fellow Silver Lake blogger Will Campbell also got a great shot of one recently.
It seems like there are way more butterflies around the Red Car Neighborhood this year. Perhaps its because we've had fairly mild weather for late Spring. There have been lots more Swallowtails, including Tiger Swallowtails around too.