Lacks a distinct eye ring, has buffy wing bars. I'm leaning towards Willow Flycatcher. The habitat is right.
Ground Squirrels like to climb. They climb up on fence posts to get a clearer view of potential threats, as in these photos, but they also often climb up into trees.
The chicks are big and have their flight feathers by this time of year
This Thrasher was using it's beak to excavate a deep hole. It was after some insect or something else burrowed in at the roots of this Coyote Brush.
Feeding on Bull Thistle seeds
Accidentally unearthed by a tractor