In 1981 I was with 3 friends at Hancock Lake in the Marble Mountain Wilderness.
I could not find a picture that could get to post but Hancock lake is 20 to 25 acres.
We spread out around the lake to fish.
Individually, we all had about the same experience and when we randomly wandered back to camp, "Did you see that?"
Rather hear and then see was what occurred.
Near dusk, an osprey had a trout from the lake but that was not what had attracted our attention.
A peregrine falcon decided it wanted the fish and attacked the osprey and they had a battle royal until the falcon won the trout.
We all heard the attack first and watched repeated attacks.
The falcon flew high about the osprey and then body slammed the osprey from above.
Several times the osprey dropped but then quickly recovered the fish but the falcon would again fly above and repeat the dive and body slam.
This happened several times until the falcon got the fish and left.
The osprey then dove the lake until getting another fish.
Seven or eight years ago one of the guys retired from the US Forest Service after nearly 40 years on the same Ranger District.
I attended his going away party and brought a gift from the epic trip over 25 years in the past.
We had walked across the Marbles mostly cross country so we could hit many fine lakes with no trail access (Hancock Lake did and does have trail access).
Our wives had dropped us off and then picked us up and we had a grand party.
The gift was we had kept a joint journal of the trip and at our celebration made up a series of "Best of" awards all recored in the notebook,
I gave Kirk the notebook.