A robin flying into the kitchen door yesterday afternoon, repeated the same hopeless effort every few seconds, despite all efforts to deter him. He continued this for 4 straight hours until dark. And now at dawn he has resumed his quest with even greater persistence. Meaning?

I wonder if it is about the white bag hanging there. It seems as if she is considering it a nestable place trying to reach it. This site gives some solutions. An interesting one is hanging a 8x10 photo of a person's face. wild-bird-watching.com/Cardi…