There appears to be a good correlation of ocellated turkey spur length with age; the longer the spur, the older the turkey.
Based upon examination of harvested male ocellated turkeys in Guatemala, there appears to be a good correlation of spur length with age, with spurs falling into three distinct groups.
Spur lengths of about 0.5 inches were typical of young gobblers less than one year old. The next group of spurs was about 1.5 inches long, and probably indicates two-year-old gobblers. Spur length of two inches and over probably indicates three-year-old or older gobblers.