Color version of previous shot. For this case, I think color works better.
As for the mysterious heron, it showed up again and did a little fishing in front of me. It is small like a night heron but it is all blue except for its head which looked charcoal gray. When I returned home, I looked it up in my birding book. I think it is a Little Blue Heron. They are a causal visitor to norther California. Fron the description, I saw a non-breeding adult.