Yeah... ravens don't put up with eagles or many large birds of prey except owls. I was WAY back in the bush one spring when a HUGE eagle lit on a tall pine on the edge of a BIG bog. A lone raven circled it (female back on the nest?). The eagle ignored the raven. The raven went up to about 200' and began to call. There had to be at least 20 big* ravens arrive in less than 5 minutes. Not only did the eagle leave but they kicked his ass on the way out. Feathers were had!

* What I call "bog ravens". The ravens along the back roads? Tiny compared to the ravens that have the choice nesting grounds way back in the bog country. I've seen a half dozen of them work together to kill large rabbits that wander out to eat blueberries. They take turns eating the rabbits. Dominant female first and then her mate and they leave enough for the others and those eat in turn. It's gruesome but somehow "understandable", for lack of a better term.