I like the dung beetle one SL, though I'd say it was more like a winged god-like alien.

Not sure if you're suggesting that one is a genuine one, but there's a telling set of observations to be made about it. Every line, every circle and every arc centres upon a bit of the crop that's been flattened as part of the pattern or previously flattened by vehicles. The chance of that happening if it was imposed from above is almost infinitely small. So for me, whether man made or otherwise, it WAS made with a stick and a rope.