Live Oak/Chaparral habitat.
Previously posted as a Prairie Falcon, which kevinhintsa corrected. I wanted to give my friend who did the original ID a chance to look at his photos, but it's pretty clear this is a Kestrel.
At least I didn't think it was a Wood Nymph or a Sphinx Moth...
This Fence Lizard nearly fooled me into thinking it was a Side-blotched, but the scales clearly point to Sceloporus.