I need help in identifying a critter that is making a mess in my new lawn. They started construction on a vacant lot next door and after excavation I started seeing these loose dirt mounds popping up along the property border (pic below...I hope). The mounds are typically 12" - 16" in diameter, and I've accumulated about 10 of them over the last 3 weeks. After reading some of the posts here, I thought maybe they were moles. However, there don't seem to be the mounded runs between the mounds or anywhere for that matter. Any help is appreciated.