There is no such thing. Unless you have a wildlife problem, or can't count ears on the ground.
The issue is yield monitor calibration, and failure to correctly shrink wet corn.
If it is cannibalized or a poor standing variety in general, pick it. Otherwise, wait.
I would 100% agree in my area the headlands next to a woods not even butted up to them is usually 50 bushel less. Have seen corn overwinter that was 180-200 in December be sub 20 by spring... Its a real thing. Figure a month more in the field probably losing 10 bushel easy... Even more once others corn gets off and thats the only food source...