Awesome diagrams!
I went dove hunting in Abasolo, Mexico last year. While driving down the barbed-wire fence lines, we saw several animal carcasses, including coyote and javelinas, that had been trapped in some crudely-fashioned snares that were tied into the barbed wire. I thought it was a shame that the animals weren't picked up by their trappers, but I could certainly understand why folks would trap them, since they are not allowed to own guns and food was scarce due to poverty. I wanted to keep some of the skulls, but I didn't want to even try to get them by US Customs.
I'm curious to how the traps were baited, and even more curious to how they got the critter to stick their head through that snare in the first place. Maybe there's something I don't understand about the way their snares worked.