Rabbits - aggressive little suckers!

Well, on one of my early jaunts, I saw a rabbit. (actually several).
Much to ym suirprise, it was chasing a couple of blackbirds away. I don't know whether it was a feeding area, or something "rabbity" that I did not see, but this particular rabbit was very intent not ridding a 1-meter square patch of grass of these blackbirds!