Buck Management | Buck Manager

Managing White-tailed Bucks by Age Class

Selective harvest is an important part of white-tailed deer management. This is equally true for both the buck and doe segments of a deer population, but many hunters become obsessed with trying to determine which bucks to shoot or not shoot. Buck harvest is part of the equation, but how should the deer on your property be managed, hunted?

For regular visitors to this site, you know that I have covered shooting deer and harvest management in the past, but this time I really want to stress the importance of not stressing out over the harvest aspect of a deer management program. Selective harvest is not something that can be perfectly implemented on a property, but rather a strategy to remove less desirable animals in an attempt improve the deer herd, whether that simply be nutritionally or possibly even genetically.

Whitetail Buck Management

The most controversial issue on any hunting property typically involves around what is and is not a cull or management buck. There is no stock answer to this debate because the quality of a cull buck will vary from property to another. It could be said that one deer hunter’s “trash” is another hunters treasure.

We have all seen bucks with obviously inferior antlers that have been shot as culls, but I bet you have also seen some really good looking bucks on the web, in magazines, and on television that were harvested by someone and referred to as cull deer. So what’s the deal?

Managing Bucks by Age

I mentioned earlier that the quality of “cull deer” will vary from property to property, but the most important consideration to keep in mind when thinking about cull deer is that the quality of bucks will vary within each age class (cohort) on a particular property.

Grade bucks of the same age on a comparative basis and the manager/hunter will be comparing apples to apples. This is the easiest way to determine what may or may not be a cull buck on a piece of property — bucks of the same age must be judged head-to-head against one another to determine which has desired (or at least more desired) antler characteristics and which one will end up in the sausage. Hey, we all gotta eat!

An Example of Whitetail Buck Management

Believe it or not, there are some properties under intensive deer management that consider a yearling (1 1/2 years old) buck with 5 or less antler points a cull buck. This does not mean every property owner or guy trying to manage his deer hunting lease should hammer every deer with less than 5 points.

It would be grossly oversimplified (and a bad idea) to say everyone should do the same thing on their hunting property. This just would not be the case. There are just too many variables for a one-size-fits-all deer management approach for every property.

Spike Buck Management

Let’s discuss spike bucks for a minute. Now, this is a can of worms that hunters and even researchers have been actively discussing for decades, so I am not going to try to change anyone’s thoughts on the subject in this article. But, using the spike buck as an example, I just want to throw out an example of culling bucks by age class.

Let’s first assume that we need to harvest some number of bucks and that I am trying to improve the overall end-quality of bucks on a property. If two yearling spikes walk out and one has 3 inch antlers and the other has 10 inch antlers, I will shoot the one with shorter tines and leave the better buck of the same age every time. Why?

Because my goal when culling is to remove the most undesirable bucks. The 10 inch spike grew over 3 times as much antler as his same-aged friend.

Selective Harvest for Better, Mature Bucks

Although selective genetic manipulation through buck harvest is an important component of any whitetail deer management program, it is not the only component. Keep in mind that better deer habitat means better bucks at every age class. Overall, providing quality deer habitat is the best type of whitetail buck management.

A key to producing good deer on your hunting property may be to remove the very low-end bucks and then allow the rest to get some age on them. This strategy is best applied in areas where deer are at or have exceeded the carrying capacity of the property. If the deer density is low, below the carrying capacity, then it probably does not make sense to cull bucks since there are not many deer to spare. In this case, you will likely want to let each and every buck walk in hopes that it can grow older and eventually become a target for harvest.

The final key to buck management is to manage harvest. Harvest mature bucks and then cull by age class (if warranted) so that you remove no more than 20% of the total number of bucks in the area each year, and then provide the best deer habitat that you can so that all deer on your property remain healthy and bucks reach their full genetic potential.

7 Reasons to Cull Whitetail Bucks

White-tailed deer management and the culling of bucks often go hand-in-hand. To attempt to improve the buck segment of any deer herd, some type of culling must take place on an annual basis. Each fall, hunters email me photos and ask, “Is this deer a cull buck?” It’s a simple enough question, but the answer depends on the quality of the whitetail bucks found on the ranch. After all, culling is relative to the buck population in question. In addition, the reasons for culling bucks are also closely tied to the manager’s objectives.

A cull buck on one ranch may be a trophy on another. Property objectives, habitat condition, food availability, and the genes found in the local deer population (for antler growth) all determine what a cull buck on a particular property will look like. Bucks found on a property must be judged against other bucks on the ranch. It would be unfair to compare deer from South Texas with a deer from East Texas or Alabama or Indiana for that matter.

Culling is best prescribed when there are too many deer for the habitat, otherwise there is no need to remove anything. It takes a long time to skew the genetic composition of a free-ranging deer herd and, depending on the size of the property, may not be possible. Although the reasons for culling bucks may vary from hunter to hunter and between ranches, there are some physical features by which all bucks are measured. Below are 7 potential reasons to cull healthy whitetail bucks.

Missing Brow Points

Brow points (G1s) are important. Plain and simple, whitetail bucks should have brow points once they reach 2 years of age. Not only are bucks expected to have brow points, but the presence of these tines is genetically dominant over deer with one or no brow points. If bucks are missing one or both brow points, then these animals should be considered for removal from the herd. I have been on several ranches where many of the bucks were missing brow points. It happens. The only way to ensure that whitetail bucks have brow points on a property is to remove what you can see, bucks without them.

Short Points

Bucks with short antler points are undesirable to most hunters and deer managers. When we think of great whitetail bucks, we immediately think of deer with longer points, particularly from the G2 on up. Short-tined bucks not only look inferior, they could be, possibly. I like to think that Mother Nature would want bucks to have long tines so that they could use them more effectively to defend themselves. In reality, body size is much more important when it comes to dominance, but short points in your deer herd means hunters get the short end of the stick.

Short Beams

Whitetail bucks with short main beams make for odd deer. We all know what a typical buck’s beams look like and that is what most hunters want to manage for in their deer herds. Long points and main beams add inches and inches to a buck’s Boone and Crockett score. In addition, bucks with short main beams leave no room for point placement. A manager can’t expect to have 12 point bucks when all of the bucks on the property have 15 inch main beams. It can happen, but we could all be living on the moon one day, too. And even if it did, is that what you want? Bucks with short main beams make for short-lived bucks.

No Mass

Mass is the most highly heritable antler trait for whitetail bucks. Bucks that have heavy mass are sired by bucks with heavy mass. On the other hand, deer with pencil horns come from bucks that were thin-horned. Of course, buck nutrition and age both play a role when it comes to antler mass. A buck’s antler mass will increase with age, so judge an individual buck’s mass measurements relative to other bucks of the same age class. If your property provides good deer habitat, then well-fed whitetail bucks should have good mass. If they lack antler mass, then think about culling those bucks if you need to remove deer and are concerned about maintaining good age structure within bucks (ie. shooting all of the young or old bucks on the property).

Narrow Spread

This is a matter of opinion, but most deer managers and hunters like wider spread bucks as opposed to more narrow spread bucks. In my opinion, inside antler spread is the least important measurement when it comes to a buck’s numerical score. I like ’em old. Most mature bucks only achieve an inside antler spread of about 20 inches, so even a very narrow-horned buck with a 12 inch spread just gives up 8 inches of B&C score if that is important to you . Because of this, whitetail bucks with a narrow antler spread can still score very high if they have long antler points and heavy mass. You can cull based on spread, but point length and antler mass are more important in the end.

Lack of Points

Every person interested in whitetail deer management wants to produce better bucks with more points. Antler points, like beam mass, are highly heritable traits in whitetail deer. If a buck has a low number of antler points, then the deer could be on the chopping block. The number of points a buck has must be judged against the deer’s age. The number of points a buck has as a yearling is indicative of the deer’s future. A high number of points at a young age typically means more points at an older age. Most want yearling bucks (1 1/2 years old) with 6+ points. Spikes, three, four, and five point yearlings may be potential culls depending on your objectives and where you stand with regards to the deer carrying cap.

Most hunters have heard of the infamous “management buck.” This term became popularized about 15 years ago as a way to market 3 1/2 to 4 1/2 year old 8 point bucks that were deemed culls. As a general rule of thumb, if a whitetail buck has only 8 points at 3 1/2 years of age, then the potential that he is going to “blow up” into something amazing decline drastically. Sure, the buck may throw on some stickers and kickers, but more often than not the deer has maxed out on main antler points. This may not a desirable buck if the hunter or manager is managing for 10+ point bucks. By using a selective deer harvest strategy, a manager can reduce main-frame 8 point bucks and promote whitetail bucks with more points to older age classses.

Maturity

This is kind of a no-brainer. If a whitetail buck is mature, regardless of antler quality, it should be considered available for harvest. The buck may or may not be a true cull, but once a buck reaches maturity it has played its role. The problem with old-aged culls is that they have been on the property for years breeding and producing both buck and doe fawns that carry their same genes. It’s easy to identify an old cull buck, but you will do yourself and your deer management program a favor by learning how to identify undesirable, cull bucks at an earlier age. Not only will culling bucks at a young age ensure your best quality whitetail bucks do most of the breeding, but it will mean more food and better habitat for your best deer!

How to Manage Whitetail Deer: Don’t Count Natives Out

Want to know how to manage white-tailed deer? Deer management is about herd improvement coupled with habitat enhancement. Although many hunters doubt the antler potential for native whitetail bucks in their area, in every area where white-tailed deer exists bucks exceeding 170 Boone and Crockett inches can be grown.

In fact, I have seen native 190+ inch bucks come from every region in Texas. And Texas is not alone. Of course, in free-ranging, native deer populations the majority of bucks will have their antlers max-out anywhere from 120 to 150 inches at maturity (5 1/2+ years old). These are good bucks. At maturity, most bucks will be good deer.

How to Manage Whitetail Deer

With that said, most deer hunters have never harvested a whitetail buck exceeding 130 inches. Why? For starters, most hunters are hard-pressed to find well-nourished bucks. Often times, habitat is in poor condition from livestock operations or there is simply a lack of deer food/habitat. This is often the case in farming communities where the only available habitat is low-lying land, untillable areas where woodlots have developed, or along creeks and rivers.

Deer Management: Managing Native Whitetail Bucks

Deer can forage on most row crops, but only during certain stages of growth or at maturity. The remainder of the time the crops are not consumed or the alleged “habitat” is plowed dirt. Well-nourished bucks need good habitat throughout the year.

Manage Whitetail Bucks for Maturity

Maturity. Show me a mature buck and I’ll show you a deer that more than one hunter is willing to put on a wall. Age, nutrition, and genetics combine to determine the potential for any whitetail buck’s antlers. Without a little age, a buck will never reach his true potential. The short answer for this maturity phenomenon is that it takes 3 years for a buck to complete his long bone growth. After this time, valuable minerals can be put toward antler growth, not skeletal growth. Bones also help store minerals prior to and during antler growth.

Mature bucks are easy to talk about, but few hunters will let a potentially great deer walk. And it’s not because deer hunters do not have patience, it’s simply because most of us do not have enough land to ensure that the buck we pass this hunting season survives into the next season or the hunting season after that. It’s difficult for anyone hunting on 30 acres, 100 acres or even a few hundred acres of land to let a young 140 inch deer walk through.

Sure, that buck may end up being over 200 inches at maturity, but what are the odds that your neighbor let’s him walk, too? And your neighbor’s neighbor? This is why the best thing small landowners can do is form deer management cooperatives with their neighbors, form some bylaws so that everyone is one the same page, and stick to them.

Managing Whitetail Deer Nutrition

So proper deer nutrition and age are very important, but genes, of course, play a part. I mentioned earlier that most native bucks will likely never exceed 120 to 150 inches, even at maturity. However, habitat that provides proper nutrition with or without supplemental feeding can add another 10 to 20 inches, but genetics still determine how big a whitetail buck can get.

A buck with “superior” genes for antler growth will outperform bucks with “normal” genes for antler growth under the same conditions. Exceptional bucks are just that, exceptions to the rule. This is where the management part must take place for the whole deer management concept to work.

Whitetail Management: How to Implement

Take any group of bucks on any property in any part of the country and some deer will have larger antlers than the others. Regardless of the bucks a property owner has to start with, the best whitetail bucks on the property are the very deer that a hunter should be managing to increase the quality of the bucks found in the deer herd. And in this case, management involves NOT shooting them young, rather providing them and their offspring with good habitat to survive and thrive in.

The other bucks should be culled, harvested, and removed, if possible. Culling is not a must. A property can still produce good bucks in the absence of culling. How to manage whitetail deer on your property is up to you. As mentioned earlier, most mature bucks are good deer. Culling is best applied to deer herds when excess deer need to be removed to keep the population in check with the habitat that is available.

In short, if a bunch of deer need to be removed from a property during a given year or over a series of years do not shoot all of the best deer or all of the mature deer, but focus on taking some trophies and then cleaning up some of the “lesser” bucks found throughout the age classes.

Managing Deer Takes Time

Repeating this process methodically year after year while keeping the herd size at an appropriate level for the habitat will SLOWLY improve a deer herd. It’s difficult to change the genetic composition of a deer herd but culling will allow the native bucks that reach maturity to be the best bucks that the property can produce.

It’s a mistake to over-focus on the culling of bucks as THE way to manage a deer herd. Managing for good deer herd nutrition and allowing bucks to reach maturity will go further towards reaching your goals. Research has shown that fawns that start off in good shape end up being bigger, more healthy deer. For that, you need healthy does with plenty of food. And as for bucks, with proper nutrition and a little bit of age, most hunters would be quite surprised at what a native white-tailed buck can do. And more than happy to put it on their wall!

Are White-tailed Deer Getting Smaller?

Small Deer in Your Area?

Have years of heavy hunting pressure impacted deer body condition and antler quality in your area? It may be difficult to say with any certainty, but it seems plausible that deer hunters, which serve as predators, could alter the gene pool of certain game species. Last month, an article presented research that found hunting had a profound impact on wildlife, driving an evolutionary process that makes animals become smaller and reproduce earlier.

The study, which looked at both hunting and fishing, examined 29 different species and found, that under human pressure, creatures on average become 20% smaller. Do deer use more energy trying to evade predators, hunters?

Feeling the Pressure

Article: “The human tendency to seek large ‘trophies’ appears to drive evolution much faster than hunting by other predators, which pick off the small and the weak.

Researchers reported, ‘It’s an ideal recipe for rapid trait change.’ In virtually all cases, human-targeted species got smaller and smaller and started reproducing at younger ages — making populations more vulnerable.

Hunters are instructed not to take smaller animals or those with smaller horns. This is counter to patterns of natural predation, and now we’re seeing the consequences of this management.”

Small Deer Study in Focus

This study makes some very good points with regards to hunters in general being trophy-oriented, but hunters and landowners partaking in intensive deer management programs are doing exactly the opposite. I have often believed that under certain conditions, such as extreme hunting pressure, particularly with regards to the overharvest of young bucks, that gene pools could be negatively impacted.

For example, some properties consider themselves “managed” by having an 8 point or better rule on harvested bucks. However, regular readers of this site know that the best yearling (1 1/2 years old) bucks can have 8+ points. This can result in decades of hunters high-grading their buck herd.

So by looking at common hunting practices this way, it becomes quite apparent that humans, particularly hunters, can impact gene pools. This is especially true in wildlife species that, like deer, are relatively short-lived. Common sense would conclude that just several years (which for deer would be several generations) of extreme pressure could alter whitetail genes in a given area. And if you are a management-minded hunter, that is exactly what you want.

Just as improper harvest can impact a deer herd negatively, proper deer harvest centered around a well-thought-out deer management program can continually change the gene pool for the better. In fact, this is exactly what the culling of inferior bucks is intended to do. Bigger-bodied whitetail bucks, much more often than not, grow larger antlers than their smaller-bodied counterparts. These bigger deer are also able to cope better with harsh winters, summer droughts, and better fight off would-be predators. In summary, help mother nature do her job and improve your white-tailed deer herd by harvesting those deer that are small for their age class.

The Culling of White-tailed Bucks is Not a Myth

There has been an ongoing debate in deer management over the culling young white-tailed bucks based on antler characteristics ever since the first research on the subject concluded. The subject at the very heart of this debate still remains the harvest of spike antlered bucks. Though many deer managers cull bucks in an attempt to improve the antler quality of their deer herd, does it really work?

DADH: “Conflicting penned deer research findings have fueled the age-old culling controversy. Study results on captive deer have produced recommendations ranging from removing all spike-antlered (presumably genetically inferior) yearlings, to complete protection of all yearling bucks regardless of their antler traits. Those favoring selective removal of small-antlered young bucks claim such a practice will remove small-antlered genes from the herd and improve antler quality.”

Texas has lead the way in terms of antler research. Research conducted by Texas Parks and Wildlife Department suggests that breeding better-antlered white-tailed bucks improved the antler quality of bucks sired, but then researchers at Texas A&M University concluded that a doe’s “nurturing ability” was the most important factor. The latter study suggests that the genetics of individual deer are not important at all?

In an attempt to end the culling debate, researchers from Stephen F. Austin State University set out to determine if a white-tailed buck’s first set of antlers were good predictors of future antler growth. Would yearling bucks in a wild population and varying in antler quality really be significantly different as they aged? To answer this question, wild bucks were captured in South Texas and yearling bucks were permanently marked. This allowed bucks to be tracked from yearling to maturity.

What did they find? Well, at 4 1/2 years old they observed no significant difference in Boone and Crockett antler scores between marked 2, 3, 4, 5, 6, 7, and 8 point yearling bucks. Researchers found that smaller antlered yearling bucks attained a mean antler size equal in width, mass, length and number of points to those starting with larger antlers at yearling age. They were also not significantly different at 5½ years of age and older. Earlier I said that culling works, but this research suggests that removing small-antlered yearling bucks would not improve mature buck antler size. So what gives?

Well, first let’s look at how the yearling bucks were grouped. In the study, yearling bucks were divided into two antler-point categories, those with three or fewer antler points and those with four or more antler points. Although their objectives were to determine if 2 and 3 point bucks were inferior to 4+ point bucks, the implications to deer managers are muddy. If one were to just read through the study it would seem meaningless to cull at all, but it’s not and here’s why.

In my opinion, instead of comparing 2 and 3 point yearling bucks with 4+ point yearling bucks, the data should be re-worked to compare 2 and 3 point yearling bucks with 7 and 8 point yearling bucks. Since most yearlings have either 2, 3, 4, 5, 6, 7, or 8 total points, I think all the mediocre yearlings (4, 5, and 6 points) bring down the average from the top-end deer (7 and 8 points). Since yearling antler points, like everything else, fall along a bell curve, I can only assume that there were many more 4, 5, and 6 point bucks in their sample than 7 and 8 point yearlings. Let’s see the data from 2 and 3 point deer versus only 7 and 8 point yearlings.

Buck Management: Culling bucks is not simply shooting every 2 and 3 point buck we see. If you are even remotely interested in improving the buck segment of a deer herd then I recommend shooting yearling bucks with 4 or fewer antler points. If you have a higher threshold for pain (especially fewer bucks in the short-term), then I suggest shooting yearling bucks with 5 or fewer antler points. This may sound insane at first, but because top-end bucks make up only 20% or less of the buck herd, the competition has to be removed! By doing this, a land owner can ensure that all future deer (bucks and does) are sired by the best bucks. If you are going to make drastic genetic changes within a population, it takes drastic action. Ranchers do not put a crappy bull, a mediocre bull, and a good bull in with their cows and hope all the calves end up being grand champions.

Buck management is not a one-size-fits-all for every ranch. Culling must occur at the yearling level as well as each age class thereafter. Bucks at each age must be compared on a relative basis to other bucks in the age class and inferior bucks should be harvested. As a property progresses in a deer management program the quality of cull, management, and trophy bucks should increase if the age, genetics, and nutrition are in place. And remember this, if genetics were not heritable why would deer breeders (whether you like them or not) consistently produce monster buck after monster buck. I think there is something to it!