Have a photo and a video. Got to work at a little before 8AM (down in a canyon, less than 1000ft above sea level I believe, also less than 5 miles from the shoreline, San Diego CA) and heard this little fella chirping. I should have realized it was strange that he didn't fly away when I accidentally parked right by him. I also thought the fluffiness was due to him fluffing himself up to get warm in the early morning. Posted on iNaturalist and someone let me know that he's a baby! When I went back to check on him a few hours later he was gone, so I'm hoping either he flew away or his parents found him and took him back to the nest.
baby bird at markim.mov
IMG_6029.HEIC