Eastern Phoebe, is the consensus.
I had help with this one from the Facebook group What’s This Bird? Just post a bird photo and in mere moments you will have eager know-it-all birders help you identify your mystery bird! I mean that in a good way.
What do I know about flycatchers? Well, only enough to think this bird is in that family. Among other identifying features, it would fly off its perch on limbs, wires, or our fence and catch bugs on the wing or in the grass.
I shared these photos to the Facebook group, with a description of time, place and behavior, and here were the comments.