Welcome to the San Francisco field ornithologists website. About UsThe SFFO is an organization of birders in and around San Francisco who are interested in advancing birding within the city and county of San Francisco.Please browse the site and see some of the activities of the SFFO. If you’re interested, please join us and get in on the fun! Oh, and by the way, our mascot is the Maltese falcon. Breeding Bird Ecology San Francisco Breeding Bird AtlasA magnum opus which is the result of thousands of hours of work on the breeding bird ecology in San Francisco. Breeding Bird CodesA discussion of what field evidence is required to document breeding.