“Another is a kind of three-limbed swastika, its arms ending in zigzags bent counterclockwise.”
Well, if it’s a swastika, it must be destroyed. It might chase people around.
***“Another is a kind of three-limbed swastika,***
I believe the term is triskelion. but using the word Swastika gets the clicks.
Looks like a tri-rotor drone to me.
My interp on those “swastikas”.
Those are natives attempting to warn the Ancient Aliens not to mess with them because they have really wicked throwing knives as shown. But, the actual knives are smaller, you know, so they can be thrown.