You do have a point. That said 'creature' is a very urban, or science-fiction style term, not to mention very non-descript... it implies an unfamiliarity with animals and wildlife. The 'Civilian' who owns a 'field' here is almost certainly a farmer, and to top that off young farmers are rare nowadays... Does it almost sound like something cliched and ridiculous out of a 60's science-horror movie? Yes, it totally does. The question you have to remind yourself is... Isn't that the closest frame of reference a guy would have for what happened?