Every hunter wants to harvest a trophy buck, but when it comes to white-tailed deer hunting the reality falls somewhere between shooting a big buck versus deer overpopulation. On one hand, you have hunters that really just want to harvest a single deer, preferably a big, mature buck. Then on the other hand, you have deer numbers that need to be controlled. This will probably not come as a surprise to you, but the average deer hunter only wants to harvest one deer, or more precisely, one buck. While most hunters love seeing numerous deer while out in the field, an important part of deer management is population management.    

The reason I bring this up is because just this last week ranches near Kerrville, on the western edge of the Texas Hill Country, were finding dead deer after several days of cold and wet weather. The cause of these deaths — malnutrition. And before assuming that these deer were confined within a high fence that maintained too many animals, I’ll let you know that they were not. In fact, most of the animals found dead were free-ranging white-tailed and axis deer, but they were all starving. Basically, the deer population of the area has exceeded the carrying capacity of the winter range. They were all competing for limited winter forage, and the weakest died.      

Reports indicate that the found deer were in poor physical condition, hip bones exposed, backbones showing, and no internal fat. The rumens of most of the dead whitetails were packed with cedar, some dead oak leaves, and even yucca leaves. Axis deer rumens were packed primarily with dry grasses. The cedars (ashe juniper) in the vicinity of the dead animals were severely browsed. Obviously, the cause of death was malnutrition caused by overpopulation that was exacerbated by the cold, wet conditions that persisted over several days.

Axis deer are more susceptible to cold, wet weather than white-tailed deer because they are an exotic subtropical species, but the end result of malnutrition is realized when mixed with winter weather. Deer in less than optimal condition are always more susceptible to disease and death. Additionally, parasite loads can only make an individual animal’s situation worse. So how can winter die-offs be avoided?

First, the deer population must be kept in check with the habitat. Sure, you may only want to harvest one buck, but realize that the health of each individual deer depends on the availability of food. Supplemental feeding can help, but only if it’s at an adequate level and of the proper type to support the deer population. Each deer impacts every other deer because of the competition for limited resources, but this contest can be greatly reduced if free-choice supplemental food is provided 24-7, year-round. When animals are found dead, remember that the weakest die first. 

When monitoring a deer population, many factors can indicate potential deer management problems. Individual body weights, fawn survival (as an indicator of doe and habitat health), and habitat use can all be used to gauge herd health. With that said, pay close attention to the health of deer harvested early in the season. Underweight deer (for their age) are good indicators of a potential problem. In addition, if deer are eating undesirable species, such as cedar, they and the habitat are in very poor condition.

Last week I wrote an article discussing harvesting white-tailed deer early in the season, which I strongly recommend. The article discussed why it is important to remove deer before winter, especially does, and the benefits of having a deer herd at carrying capacity. Well, one reader posed a question that many of you may be interested in:

“What about nursing fawns early in the season? Will taking lactating does hinder growth and development in these young deer?”

Yes and no. To begin, whitetail fawns are usually weaned and become functioning ruminants at eight weeks of age. Most fawns at southern latitudes are born in late May and June, meaning the majority of fawns are weaned by the end of August. And this makes sense from a biological perspective, because as late-summer food sources deplete the doe can then rely on the fawn to nourish itself. This covers the majority of whitetail fawns that hunters will encounter in the field during the fall hunting season.

However, if you see a late-born fawn that still has spots, then I would not recommend harvesting the doe. Spots suggests that the deer is not old enough to survive on natural forage alone. With that said, fawn survival ultimately depends on habitat quality. Malnutrition and associated problems are the primary cause of poor fawn survival in most areas. Poor habitat does not help the doe feed the fawn, or the fawn feed itself after it is weaned. Poor habitat is bad for recruitment and drought conditions only aggravate the problem of inadequate food.

In general, harvesting does with fawns will not impact an individual fawn, unless of course the fawn is less than two months in age. Fawns older than two months, found in areas with good habitat, are just as likely to survive after the doe is removed. In short, if you need to remove does to get your deer herd at carrying capacity, do not hesitate to harvest does with older fawns. 

Deer hunting season takes place in the fall for one primary reason — to remove excess animals from the landscape prior to winter. When it comes to the deer carrying capacity, winter is THE limiting factor. As a result, proper harvest is essential for the deer herd found on your property, their habitat, and your overall deer management program. With the the onset of winter just around the corner, do not forget to harvest deer, especially does, as early as possible. I mention this now because as the end of the year approaches, the time that many hunters have to head to the field decreases. The Christmas and New Year’s holidays can take away from your days in the field. It’s hard to harvest deer and reach harvest quotas if hunters can not make it out to the ranch.

With winter officially kicking off on December 21, time is running out to get the deer population on your property down to its winter carrying capacity. If you are not sure what the proper deer carrying capacity for your ranch is, then you first need to contact a wildlife biologist in your area. Carrying capacity refers to the number of deer that a property can over-winter. It varies by ecological region, habitat type, and ranch, but it is the first piece of information you need to properly manage any deer herd. If the proper density for a ranch is 1 deer for every 10 acres, then a 1,000 acre ranch can over-winter 100 white-tailed deer. Excess animals, if they exists, must be removed annually to ensure the health of the remaining deer. 

With much of the deer season already gone, why should you always aim to harvest deer as early as possible in the season? Below I have listed three good reasons why early doe harvest is important for your deer management program.  

Food – This is the primary reason you need to harvest deer early. Natural food sources will decrease throughout winter. If deer surveys estimate that 20 animals need to be removed from the ranch, why let those animals consume limited food resources for an additional month or two prior to harvesting them? Removing them early leaves the natural foods those “dead deer walking” would have consumed for the remaining animals, which keeps your deer herd healthy and strong. If a supplemental feeding program is in place, the same concept applies and you save money.    

Buck to Doe Ratio — Bucks will continue to rut and breed does until all does are covered. If a large number of does must be removed, it is best to remove them early. If most of the does are bred early in the season, then bucks can save valuable energy and body mass. In addition, whitetail bucks become more visible because there are fewer does available in the woods. Maintain your buck to doe ratio and the overall health of your herd. 

Fawning Dates – As mentioned above, harvesting excess does early in the season allows bucks to cover the remaining does much quicker. Fewer does per buck results in more does being bred on their first cycle. This, in turn, means more fawns are born earlier in the year. These early-born fawns will be larger before the other stress period for white-tailed deer sets in, summer. Early-born fawns means more food for lactating does, resulting in increased fawn production. 

Each landowner or property manager must recognize the habitat needs of white-tailed deer on a continual basis and direct management towards meeting those needs. Since white-tailed deer have a relatively small home range of about ½ to 1 mile in radius over an annual basis, all of their needs for growth, reproduction, and cover must be met within this unit. Deer management is about food management–as in habitat.

Whitetail will seldom move from within their home range to meet their needs, even though better conditions may exists in the surrounding area! Deer are very versatile in their feeding habits and will eat a wide variety of items, including fruits, browse, forbs, agricultural crops, and even small amounts of grass. Deer “perform” best in habitat where a great variety of preferred food items are present.

Diversity within a habitat will result in some preferred food items being available at all times during the year. With that said, a shortage of palatable foods during any one season of the year will limit deer numbers during other seasons. The limiting factor for any one season is THE limiting factor for an entire year!

Even though white-tailed deer are versatile in feeding habits, they also are very selective. Just because you may see “a lot of grass out there” does not mean there is a suitable amount of deer forage present. Everything green is not deer food. As a matter of fact, usually less than one-third of the plants in an area can be classified as “good” deer foods. As a result, management must be directed toward preserving species of trees, shrubs, and vines which are preferred as deer browse.

Browse, as important as it may be, is not a cure all for deer diets. I will discuss this topic more later this week.

In general, white-tailed deer generally live within a home range of approximately one square mile. However, this range can increase during the breeding season, especially for bucks. Unless your property is high-fenced, a deer’s daily movements within that home range throughout the year often results in movements into habitat found on more than one adjoining landowner.

As a result, it is important to understand that landowners share individual animals. For this reason, the potential for successful white-tailed deer harvest management diminishes as landownership size decreases. It makes sense that as the size of individual ranches continues to decrease throughout an area, effective and meaningful management can be a challenge.

Fragmentation of habitat often results when changing land uses occur on adjoining tracts of land that were once uniform rangelands or woodlands. The increasing cost of land and the desire for folks to have just a small “piece of heaven” only increases fragmentation issues.

Once split up for focus on ranching, farming, or whatever it may be, the food and cover required to support a desired density of white-tailed deer may no longer be present. And due to different management philosophies, or lack thereof, the quality of habitat may also vary considerable on between ranches or varying size. Overgrazing of rangelands by livestock, the development of improved grass pastures, or any other land use for that matter, can modify, reduce, or eliminate white-tailed deer habitat and the associated animals.

As landownership size decreases, the potential for over-harvest of a white-tailed deer populations increases. Bucks that leave their home range during the rut will likely be exposed to added hunting pressure on adjoining ranches that may not have the same goals and objectives.

In general, most landowners neither do not set harvest recommendations based on population management criteria, nor do they restrict the number of hunter on lands they lease out for hunting. If you own a smaller tract of land, think about forming cooperatives or local associations to develop common goals and objectives for white-tailed deer management. It can work and you can make it happen!