Hello everyone! Recently, I've been witnessing a White-Breasted Nuthatch open and close his wings with a type of great intensity. The wing movements aren't as much of a flap, but as if the nuthatch were to want to open its wings for a stretch but tuck them back in. In fact, the surging of the wings looks like a stretch itself! I was interested because I've seen aggressive flaps from birds, but never this smooth and more calculated motion. I think this could potentially be a sign of annoyance or aggression--but I'm not completely sure. It would be great if someone could help. :) Thank you!