Dr. Shapiro and his wife joked that this butterfly truly wanted its picture taken since it kept landing right in front of me to mud-puddle. I'm glad I did, since I'm not sure if I have another top view of a CA sister in my photo archives. I consider it fairly common at several of the places I hike closer to home. It's such a stunning butterfly, even viewed from the underside. Art mentioned that both male and female CA sisters mud-puddle, which is unusual considering often only male butterflies do this mysterious behavior. What got me with this post is just now noticing the name change. Erg. A. bredowii is now reserved for the Mexican sister, which per its name is found in Mexico. It does seem like common names are becoming more reliable.