Howdy all, I saw this bird on Sunday, but I didn’t get a great view and no picture.
I could only see its dorsal (back) side. It was all black with four thin white stripes - two white stripes running straight from the sides of the head to the tail just medial of the wings, and two white stripes that followed the leading edge of the wings (small black space between the actual leading edge and the white stripe) and ran out to the tips. During the 15 seconds or so I could see the bird for, its wings were held rigid as it swooped into the fog.
It was seen about 12-16 miles northwest of the Golden Gate Bridge, probably 8 miles from shore.
I’ve thought that it might be a murrelet, but the pics I’ve found only appear to show two dorsal white stripes: http://www.cortesisland.com/cgi-bin/tideline/show_sitemap_article.cgi?ID=666