I finally went out and collected all my bags of seeds the middle of September. The spinach seed bag was completely gone. I couldn't find any sign of the bag or plant anywhere in my yard.
I had a large bag that I placed around the lettuce seed heads. I finally opened the bag the middle of October and there were no seeds in the bag. I found a lot of earwigs and a couple of spiders. The same thing happened with my beans.
I left the bags in the garden longer than normal and I have never left the bag of seeds unchecked for a month before. So learn from my mistake and don't be lazy or you will have nothing.