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Aging Deer

Aging Deer. Fish & Wildlife. Methods of Aging. There are only accurate 2 methods of aging deer: Surgical methods Mandible (jawbone) analysis *Despite claims, age CAN NOT be determined by the size or spread of the antlers. Jawbone analysis. Developed by Sevringhaus (1949)

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Aging Deer

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  1. Aging Deer Fish & Wildlife

  2. Methods of Aging There are only accurate 2 methods of aging deer: • Surgical methods • Mandible (jawbone) analysis *Despite claims, age CAN NOT be determined by the size or spread of the antlers

  3. Jawbone analysis • Developed by Sevringhaus (1949) • Based on tooth replacement and wear • Slight variations

  4. Parts of the jawbone

  5. Parts (cont’d)

  6. When aging, consider… • Deer are aged in fractions because they are usually born in June or July and harvested late in the year during the open season • Only the lower jawbone can be used to age • Tooth wear, replacement, and size of the dentine line are the most important factors to be considered in the aging process

  7. 6 Months Old

  8. 1-1/2 Year Old

  9. 2-1/2 Year Old

  10. 3-1/2 Year Old

  11. 4-1/2 Year Old

  12. 5-1/2 Year Old

  13. 9-1/2 Year Old

  14. “On the Hoof” Aging • Uses physical characteristics & Human sight to determine age • Not as accurate as other methods

  15. Buck Fawn • Pedicles are beginning to emerge • Long ears & short nose • Long & skinny legs with a playful walk

  16. 1 and ½ Years • Smaller body frame • Shoulders lower than hips • Baby Face • Pencil Neck • Neck above brisket • Small Chest and Flat Stomach

  17. 2 and ½ Years • Shoulders and hips level, but shoulders are underdeveloped • Better developed hips than shoulders • Small Chest and Flat Stomach • Boyish Face • Skinny Neck • Neck 3” above brisket

  18. 3 and ½ years • Muscular Adult frame with flat back • Teenager Face • Muscular neck meets brisket • Flat stomach with rise from barrel • Shoulders and hips look balanced

  19. 4 and ½ years • Beefed up frame and Rounded Back • Filled out hips and shoulders • Stomach meets barrel and forms straight line • Manly face with Roman Nose • Neck and brisket merge together

  20. 5 and ½ years • Massive back that is slightly swayed • Classic Roman Nose • Thick neck and brisket make him appear “chest heavy” • Shoulders look heavier than hips • Slight drop in belly

  21. 6 and ½ years • Heavy Sway Back • Warrior Roman Nose • Fat neck and brisket • Potbelly dropping below chest • Old man blocky body with rolls and folds

  22. Conclusion • Look for the tricuspid premolar first, then look at the dentine and wear. • When it comes to aging deer, practice makes “almost” perfect

  23. References • Northern Prairie Wildlife Research Center. www.npwrc.usgs.gov, 2001. • White Tail Buck Body Aging Guide. U Score’M, 2006.

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