algae scum growing on a seep site in serpentine soils
In Marin County, this species is only known to occur at this location.
I was surprised to see this rare "red" fox sparrow in scrubby serpentine habitat near chaparral.
I believe it is actually in the subspecies zaboria, which is not currently in the iNat taxonomy.
Great description of this type is here: http://creagrus.home.montereybay.com/MTYbirdsFOSP4.html
found under a rock on serpentine soil