Aging Bucks by Body Traits

Aging bucks on the hoof is as much art as science. You won’t get it right every time, but keep trying.

 

Gauging the age of a wild buck deer isn’t as easy as counting antler tines. As detailed in this article on ronspomeroutdoors.com, you can’t depend solely on antler size when visually aging bucks. A 4×4 rack does not indicate a 4-year-old buck. Neither does a wide, tall rack. Bucks as young as 2½ have, rarely, grown antlers large enough to make the B&C book.

Big deal. All that proves is that they had the genetic potential to grow even larger racks in another year or two. Why? Because no whitetail, mule deer, or blacktail can grow its biggest antlers until at least 4½ years old. They might have the genetics for big antlers, but until fully mature at 4½ years, they are still filling out their skeletons and body mass. Once that’s accomplished, they can borrow (via a type of osteoporosis) calcium from their bones to grow their largest antlers.

 

Fairly long legs, deep chest, and an even belly line combined with average antler mass add up to a 3.5-year-old. The wide neck still tapers up a bit from the brisket. The nose is beginning to look shortened, as it does in old bucks. This could be a 4.5-year-old, too, wearing down from the rut.

 

The few 3½- and 2½-year-old whitetails that have been shot with genuine B&C trophy racks atop their young heads are genetic freaks. You definitely don’t want to shoot those before their time. If they can amass 180 inches of antler when immature, imagine what they might produce when fully mature!

Of course, passing up a shot at any free-range buck wearing 180-inches of external bone takes more self-control than I probably possess (and I don’t think I’m alone here.) This explains in part why so few bucks ever show up wearing world-class antlers. We shoot them too soon. But together we hunters can begin to change that, and here’s how.

 

The size and bulk of this prime 3.5- to 4.5-year-old buck is clear when compared to the does and fawns he’s courting. His antlers hardly measure up to his body mass, however. Next year they could enlarge significantly, but chances are he doesn’t have the genetic code for truly large antlers.

 

AGING BUCKS TO PREVENT PREMATURE HARVEST PROMOTES LARGE ANTLERS

To increase the number of heavily antlered bucks in any wild herd, we should try to shoot only 4½-year-old and older bucks—big, fat, strong, mature bucks that have the age to maximize their genetic antler potential. The vast majority still won’t make B&C, but they’ll carry the kind of antlers most hunters would be tickled to hold. To identify these mature deer and avoid shooting a too-young buck, forget the antlers and study the body.

Here are some traits to look for when aging bucks:

 

SIX KEYS FOR AGING BUCKS

  1. Leg-to-body ratio. Bucks older than 4 years appear to have legs rather short compared to their trunks. Study nearby does or young bucks with slim, graceful legs and bodies for comparison. An old buck’s legs aren’t any shorter; its chest and belly have just gotten deeper.
  2. Chest and belly size. After age 4, a buck’s belly no longer tapers behind his chest/brisket. It bulges and extends level with or even below the brisket. A 3½-year-old buck will sport a deep, massive chest and a narrow waist, much like a young human body builder. At age 5 and beyond, they keep the massive chest but gain a pot-bellied look, too. This, however, can change during the rut if they’re not eating much. 
  3. Neck size compared to brisket. This varies by time of year, too, but by November a mature buck’s neck has swollen so much that it appears to emerge evenly with its chest/brisket. The brisket itself on an old deer seems to protrude farther in front of its forelegs than do a younger buck’s. Seen head-on, a fully mature buck’s neck in November should remind you of an NFL lineman’s (minus the shoulder pads.) Its head should appear too small for the massive, bulging neck.
  4. Face. The narrow, slim, long-nosed look of youth is gone from most old bucks’ faces. If the nose looks broad and short, perhaps even “Roman nosed,” chances are it’s an older deer.
  5. Jowls. Just as old men often develop sagging jowls below their jaws, so do bucks. Look for sagging skin below the jaw as a sign of an old, old buck. This is best seen in profile from eye level.
  6. Fat, slow, and heavy. That is how a fully mature buck should look and act—because it is. Old bucks walk less often and more slowly than young bucks. While they’re still capable of running and leaping, the spring and youthful exuberance has been worn out of them. A running old deer should remind you more of the actions of an Angus bull than a whitetail doe.

 

CORRELATE BODY TRAITS TO ANTLER SIZE FOR FINAL TOUCH WHEN AGING BUCKS

Once you’ve noted these basic body conditions, you can correlate them with the buck’s antlers. In general, older bucks carry more massive antlers than younger bucks. They might not be taller or wider, but will almost always be thicker, especially at the base. This is because the bony pedicle from which buck antlers grow increases in diameter each year until at least age 4½.

Stickers, forks, drop tines, and other antler anomalies usually spring from age, too. Add them to the bulky body, big gut, short legs, oversized neck, shorter face, and heavier antler mass and you can shoot, trusting your buck has probably maximized his antler growth.

 

This buck is a puzzle. It’s gut looks big and old, but its chest doesn’t quite measure up. Nor does its neck. The legs seem a bit long and graceful and the antlers thin. I’m guessing a strong 2.5-year-old, but more likely an average 3.5-year-old.

 

CONCLUSION

Aging bucks on the hoof is as much art as science. You won’t get it right every time, but keep trying. Keep watching and studying and you’ll soon become an effective judge of geriatric male deer. 

P.S. By the way, the venison from an old buck is no less tasty than that from a young buck. It usually isn’t any less tender, either, if you indulge in another form of aging bucks: Hang the carcass for five to ten days at 33 to 45 degrees Fahrenheit. Avoid contaminating the meat with urine-stained tarsal glands and old buck venison can be delectable. I’ve shot bucks as old as 13½ (a biologist counted annual rings in the teeth) and found the aged venison tender and delicious. 

 

Prime, healthy, well-fed 2.5-year-old. He’s already getting some chest and neck bulk, but his long legs and spindly rack bespeak youth.

 

Study the bulk, fatter torso, and thicker neck of the background buck and you see the maturity differences. I’d guess 3.5 for the close buck, 4.5 or older the other. Neither has a particularly impressive rack. I’d be tempted to let both live another year and see what develops.

 

The alert, stretched neck of this buck makes judging neck diameter a bit difficult, but relatively narrow chest and neck suggest 3.5-year-old. The gnarly, heavy antlers, however, hint at older. A close look seems to reveal a bit of jowl sag on each side of the lower jaw. Tough call, but the antler mass leads me to label this a fully mature buck. I’d want a broadside view before deciding.

 

The overall bulk, low belly, massive neck, and blunt face/nose of this Oklahoma buck combine with massive antlers to shout, “Old!” I couldn’t close within bow range to take him.

 

Here’s an extreme example of a jowly West Texas buck. Look how the white furred skin beneath his jaw droops. Torn eyelid shows he was a fighter, too.

 

 

For more from Ron Spomer, check out his website, ronspomeroutdoors.com, and be sure to subscribe to Sporting Classics for his rifles column and features.

 

 

 

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