I spotted 2 of these birds by the vineyard at Lincoln University campus. I am pretty sure they were California quails since both had a crest plume sitting on the top of their head curving forward. They had a brownish colouring.
Just heard this one
Don't see these too often in this location.
San Diego County, California, US
The California Quail (Callipepla californica), also known as the California Valley Quail or Valley Quail, is a small ground-dwelling bird in the New World quail family. It is the state bird of California.