I was once canoeing in a marsh doing a water quality assesment and fish inventory and while going through an area rich with ducks, a bald eagle swooped out from nowhere and almost ripped me to shreds. it was frightening, I didn't realize how large these birds are, and it's sharp beak and talons were headed straight for us. it turns out the ducks knew the eagle was there and that's why they hadn't taken off from the water (the eagle would have snatched them from the air no problem), so they were all around us and the eagle was making a pass to try and get them to take off but we were in the way 😱 . it was an amazing sight, but I don't want that to happen again.
I can imagine how these ancient humans felt with birds swooping to kill them, it's not a pleasant thought at all