A few years back, I was told about aging deer, by measuring from the bottom corner of the eye, to the tip of the snout. If I remember correctly, 4.5 inches was 1 1/2 years old, and add a year of age for every 1/4 inch. (I THINK those were the numbers).
Later that season, I killed a buck that we thought was 4.5 yrs old, and did the measurement, and it was right on.
Coincidence? Or is this a half decent way to do it?