Multivoltine Butterflies

I found a Gulf Fritillary in my garden today, eating Passiflora 'Berkeley.' Seems like I see adults and caterpillars almost all year around. However, I read something different in the North American Butterfly Association's publication, American Butterflies. In the Spring 2011 issue is an article titled, "Food for Thought: Butterfly Hostplants and Ranges." In the article, authored by Jeffrey Glassberg, is a map indicating that Gulf Fritillaries have two brood per year in most of California. I don't think so. Seems like it must be five or more, given how long it takes them to go through a generation and how much of the year they fly. I am going to have to start documenting their life cycles. So this photo is the first data point. Large caterpillar eating on August 31. Gulf Fritillaries are tropical butterflies that just don't seem to understand seasons.