Skink with bright blue tail, 15-17 cm in length, hiding in thick understory in Oak, buckeye- dominated forest.
Singing like mad in the late afternoon.
Merriam's Chipmunk (Neotamias merriami), Picchetti Ranch Open Space Preserve, Santa Clara County, California - July 2009. I found several of these chipmunks in an oak tree making loud and persistent vocalizations that sounded a bit like raucous Bushtits. Reportedly, these little sciurids can make sounds that mimic Northern Pygmy Owls, but I didn't hear those this time.
Tweoo-weoo-weoo in the very early morning.