Well I know this isn't all that exciting but I thought I'd post it anyhow. this is a crawdad/crayfish/crawfish hole. These are very common around here and if your dog isn't careful one might pop out and catch his lip (just ask Jiggs)!!!!! These are a pain in the neck when you are mowing and your yard is covered in them. You have to knock them over because some of them can get pretty big! They dig from undergound and push the mud up with a tunnel in the middle.
