Possible footprints found near Metropolis witnessed in Massac County, Illinois

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To be honest, I'm very reluctant to submit this report but the pictures and details are simply too compelling to ignore. Two months ago my wife and I purchased five acres of rural, wooded property here in Massac County, Illinois. I mow approximately two acres of this ground, with the rest of it being heavily wooded. I know nothing about Botany, so I can't describe the vegetation on the property outside of an Oak and/or Silver Maple trees. Just take my word for it ' it's thick with trees and underbrush. On May 3rd at 6:15p.m., my wife, myself, and my two boys sons went out to this new property to have a picnic at the cabin. I was half-way down the hill toward the cabin when my wife yelled, 'Oh my gosh! Look at this - look at this!' She was up the slope close to our parked trucks, staring at the ground. I walked back up to her position and she was staring at this print on the ground (pictures attached). I had, evidently, walked right over the track without noticing. I then sea...