That has to be the purpose of the kites. I still wonder about the gates though. Those don't look useful for hunting. Especially the one on the volcanic mound.
If the kites are for trapping animals, wouldn’t the gates be pens to hold them? If you trap 1000’s of antelope or whatever, you can’t kill them all at once, you have to keep them somewhere.
These kinda look like stockyards to me.
The article claims the walls aren't high enough to keep animals penned.