Unfortunately no photo from me for this (the above is from Wikipedia, but was taken in Berkeley), but I spotted a Gulf Fritillary today. Not something I have seen before, and the Bay Area is on the edge of its range.
From Wikipedia:
The Gulf Fritillary is commonly seen in parks and gardens, as well as in open country. Its range extends from Argentina through Central America, Mexico, and the Caribbean to the southern United States, as far north as the San Francisco Bay Area on the west coast. It is occasionally found farther north in the US.
