Red cardinal singing his heart out

We have a cardinal that lives behind us. At least one cardinal, almost certainly more. I've seen the females before as well.

This guys starts singing around 4:20 am in the morning, and goes until about 9:00 pm at night. I wonder if he ever gets tired? Apparently not.

Usually we can hear him, but not see him. Yesterday I caught him with with my camera. He's a noisy little shaving cream. You can tell, since I had to zoom in on him to the max and still you can hear him well.

Here's his picture:

And his song