The Hermit Thrush is similar in size to an American Robin, but smaller. They often stand upright with their slender bill slightly raised. A variegated bold eye ring emphasized their large dark eye; they flit much less than a Warbler and can often be seen perched on a twig looking very alert.
The rest of the campground was very quiet. Due to the prolonged drought there is less for the birds to eat, barely any insects, and both seeds and berries are in sparse supply. Now is when we humans need to become advocates for the birds. If at all possible put out birdseed and or suet and water, especially if you are in California.