Hello
just this past year in spring i saw a starling go into a hole following a flicker and heard a fight going on it chased the much bigger flicker away. It actually stuffed itself into a small tiny area with the bigger stronger bird and beat it till it left its hole/nest.
I could not believe it did that, because usually smaller birds win by using their agility to their advantage they dont lock in battle in a tiny spot bit a much stronger larger bird.
Have you guys seen such things? Do starlings drive off things like blue jays as well? THey seem to be scared of common grackles.