Why would a crow fight with an eagle?

To drive it away, usually away from the nest or a food source. but sometimes just to get it to leave the area where the rest of the mob is. Surprisingly small birds will drive off eagles if they are near a nest. Smaller birds have a huge advantage over an eagle in maneuverability in straight flight. read more

Surprisingly small birds will drive off eagles if they are near a nest. Smaller birds have a huge advantage over an eagle in maneuverability in straight flight. They can easily get above the eagle where it can’t reach them with its feet, and peck its head and pull its feathers, all of which hurt, though they don’t do much actual damage. read more

But the trip may have started as an attempt to pick a fight. New photos show a crow riding on a giant eagle. But the trip may have started as an attempt to pick a fight. read more

It is possible that the crows are mobbing the Eagle. This usually occurs when the Eagle (predator) has threatened the crows offspring. According to Wikipedia (Mobbing (animal behavior) - Wikipedia): “Behavior includes flying about the intruder, dive bombing, loud squawking and defecating on the predator. read more