algae scum growing on a seep site in serpentine soils
In Marin County, this species is only known to occur at this location.
I can't figure out which race this bird belongs to. It's too pale on the chest and back to be the sooty, yet the bill is too small for the big-billed race. I was surprised to see it in scrubby serpentine habitat near chaparral.
found under a rock on serpentine soil