Foraging on Deerweed. Pollen sacs visible (female).
Probably Bombus vosnesenskii, but could be B. caliginosus. These two species can rarely be differentiated by photo and need microscopic analysis for reliable identification.
Reference:
https://www.inaturalist.org/journal/truthseqr/32809-yellow-faced-bumble-bees-other-pyrobombus-species-in-the-sf-bay-area
(Kennedy Trail)
Small black brown and white speckled owl, approximately 8-10 in tall