Be on the lookout for Giant Swallowtails. I've seen 2 in the past week. They're mostly black & yes, they are gigantic. We also have Pale & Anise Swallowtails in the Red Car Property neighborhood.
While there seems to be a Butterfly Bonanza in the neighborhood this year, learn how to attract butterflies to your yard: Butterflies and Their Larval Foodplants, Peter J. Bryant, UCI