A hunter in USA shot a 4.5m long, 300kg alligator, that was treating his farm's livestock as a buffet.Hunter Lee Lightsey said the reptile was one of the biggest he has come across in 18 years and required a tractor to move.A picture of Lightsey's son, Mason, standing next to the alligator, as it is hoisted in the air, reveals just how massive the beast truly is.Lightsey said the hunters had come across lots of alligators that were only "a little smaller" over the past two decades. The largest alligator previously killed was just over 4m long.