(Sorry for the long silence. Sick with a cold that I just couldn't shake).
Surprisingly, he didn't take off and in fact, flew to the fence while I kept taking photos and then on to the birdbath.
And I went off to the bird books to figure out what this bird was as I hadn't seen it before in the small garden. It is a Gray Catbird, a smaller cousin to the Northern Mockingbird who occasionally comes to my bird feeders. It tends to be quite shy and solitary which is why I hadn't seen it before.
There's a nest in the crepe myrtle next door, so I will probably have more visits from my new visitor.