Tracy, what is the significance of Trey shaking his head as if it's vibrating, is it because he's cold? Or is he getting a headache from the squirming kids lol
He does that alot, not sure why. The Elk River female does it too if you watch her. Might be just settling feathers, or knocking off rain or flies, but he does it rain, shine, sunny, cold. Could just be a stress reaction - raising chicks is a stressful time (peregrine physically stressful, not human psychologically stressful) for the birds, brooding, feeding, hunting, defending, could be his version of hives.