There were at least 20 individuals, including about half adults with characteristic checkered breast
there were lots of birds flying back and forth between this large (tallow!) tree growing on the bank of a drainage channel and the grasses across the channel. in the first photo, there are two (adults) to the left with reddish brown head and back and white an black belly. along with two (juveniles) nearer the center with duller plumage
Guadalupe River Trail North of Blossom Hill, Santa Clara County, CA, 2020-09-20