I mentioned BIG snails because there are BIG ones, the Giant East African Snail grows to 8 inches! The eggs are 4.5 to 5.5mm so they could be tough. They are in Florida, not sure about elsewhere. They can lay up to 500 eggs. I doubt these are snail eggs, look closely and they have a curved bottom.
http://www.infonet-biovision.o...
http://www.kentucky.com/2015/0...
I cropped off part of one of the last pics and enlarged it, there appears to be a grub shape to the left of middle near the top. A couple of the 'things' appear to be embedded in the ground. There are some hard fungi which grow on wood, do I detect some charcoal on the ground? Is the hole due to these being dislodged from where they have been attached? There's one and a half seed pods in the crop but I doubt they belong to those, or do they? Could there be tiny grubs eating the middles out of seeds?