We have a pack rat (aka woodrat). Correction - we had a pack rat. He/she/it has not come back after we destroyed the lovely abode you see here. This was in the corner on our house and the fence.
I get the weeds and the lint. And although you can't really see it in this photo, there were also lots of little cholla balls (little pieces of spine enrusted cacti). Makes perfect sense. But where the hell did it get that corn cob?
Also? We have a dog, a pretty large dog. A dog who likes to poop a few feet from this very spot. She, who almost removed my arm once when she spotted a rabbit during a walk, she apparently never noticed this.