This triggered a memory of finding Gulf Fritillary caterpillars and chrysalids a couple of years ago (June 2016) while we were in the line for SF Giants Ferry. The dock is in Larkspur, and I noticed a passionflower vine (Passiflora sp.) just before boarding:
Looking more closely, there were several Gulf Fritillary caterpillars (below) — with bold stripes and prominent spikes!
And there were also a few chrysalids attached to the frame supporting the passionflower vine:
For more about Gulf Fritillaries, see the post called "Silvery spots" from 11 April 2015.