The same day I took photos of the mockingbird, I videotaped him.
I was afraid that he might fly away as I drew closer and closer to him, but nothing phased him. He was a professional performer. And the bigger his viewership, the better.
This was his entire audience before I arrived:

This small bird showed his appreciation by flapping his wings up and showing the brightly colored undersides. I guess this is an equivalent to clapping in the bird world.
My mockingbird performed a long set through sirens shrieking, cars driving by, other birds calling, leaf blowers droning. The show went on!
I edited my footage and created the following movie, so you too can enjoy his vocals.
I'm sure if this mockingbird could comprehend the size of the internet, he'd blush at the thought of his possible viewership and potential fans!