One of the most awesome things I have ever witnessed was about 7-8 years ago. My buddy and I were out driving a rural gravel road when we stopped to take a leak.
Standing there when notice 2 bald eagles flying around about 4-500 yards away. Not an uncommon sight until they both flew way in the hell up in the air and pretty much locked talons(?) and spiraled down to the ground.
Spinning and twisting around until they got fairly close to the ground when they separated. They repeated this 2-3 times and of course we just stood along the road and took it all in.
It was late March or April when it took place and the only thing we could think of was they were mating.
Neither of us had ever seen anything like it. Pretty wild maneuvering.
