University of Missouri Extension

G9481, Revised July 2012

Estimating Deer Populations on Your Property: Camera Survey

White-tailed deer management

This deer conservation guide is one in a series developed jointly by MU Extension and the Missouri Department of Conservation.

Robert A. Pierce II
Fisheries and Wildlife State Specialist
School of Natural Resources
Jason Sumners
Resource Scientist
Missouri Department of Conservation
Emily Flinn
Resource Scientist
Missouri Department of Conservation

Implementing a sound, quality deer management program depends on obtaining accurate survey data. Obtaining accurate census data requires the ability to collect reliable estimates of deer density on your property. Many hunters use infrared-triggered digital trail cameras to scout and pattern bucks on their property. This type of trail camera may be the best tool available to landowners for determining important demographic characteristics of the deer herd on their property. A camera survey can be used to monitor population demographic trends of deer densities, age structure, sex ratio and fawn recruitment. This guide outlines how to conduct a camera survey on your property.

Conducting a camera survey

The two time periods during which camera surveys are typically conducted are preseason and postseason. Because attractants or bait such as corn are used during camera surveys, preseason surveys should be conducted in August so as not to be in conflict with baiting regulations. Scheduling a postseason survey in Missouri is much more of a challenge. Postseason surveys should be done before the casting, or shedding, of antlers but not at a time that would violate baiting regulations. For these reasons, we recommend a preseason, late-August camera survey.

To lay out a camera survey, you will need a map or aerial photo of the property. Aerial photos are available through the following websites:

On the map or aerial photo, lay out a grid that divides the property into cells equal to the number of cameras you intend to use. Usually, one camera per 100 acres is sufficient. Locate each camera station near the center of a cell in an area with convenient access that is likely to be visited by deer.

Once you have identified the locations of the camera stations, bait each area with about 50 pounds of corn about one week before beginning the survey. Replenish corn as necessary to ensure bait is always present.

Set up the cameras when deer begin to visit the bait site on a regular basis.

Run the camera survey for 10 to 14 days. Check stations every four to five days to ensure bait remains and cameras are working properly and have sufficient battery life and memory card space. Replenish bait and replace camera batteries and memory cards as needed. Each camera will function differently, so rely on previous experience regarding battery life and memory card capacity.

Identifying individual bucksFigure 1. Identifying individual bucks is easier with high-resolution photographs that are date- and time-stamped.
 

New restriction to limit the spread of chronic wasting disease

As of Sept. 30, 2012, grain, salt products, minerals and other consumable natural or manufactured products used to attract deer are prohibited in the chronic wasting disease (CWD) containment zone, which comprises Adair, Chariton, Linn, Macon, Sullivan and Randolph counties. Using such products to attract deer artificially concentrates deer within a small area, thus increasing the chance of CWD spreading from one deer to another or from the soil to deer. Because bait is required for camera surveys, population demographics on properties located in the CWD containment zone should be collected through another method, such as recording observational data (refer to MU Extension publication G9482, Estimating Deer Populations on Your Property: Observational Data).

 

Analyzing the data

When the survey period is complete, begin analyzing the photographs.

Managing thousands of photos can be a challenge. To make it easier, develop a system for organizing all the photos taken during the survey. One good way to manage the photos is to create a folder for each camera station and put all the photos from each station in the station’s folder. Then, copy all the buck photos into a “buck” folder for further analysis.

Use the time and date stamp, as well as location, to help differentiate bucks. Yearling bucks are especially difficult to identify as many of them look exactly the same. Opening multiple pictures for viewing, or printing all buck pictures may allow for better differentiation of individuals. After all photographs have been analyzed, calculate population estimates as illustrated in Table 1.

Table 1. Example of calculating population estimates using a camera density of one camera per 100 acres for 10 nights on a 1,000-acre property.

Camera survey data analysis
 
Acres sampled 1,000
Camera stations 10 (1 per 100 acres)
Census period August 10–August 20
 
Different bucks 8
Total bucks 29
Total does 79
Total fawns 51
 
Doe:Buck 79 ÷ 29 = 2.72 does per buck
total does ÷ total bucks
Fawn:Buck 51 ÷ 29 = 1.76 fawns per buck
total fawns ÷ total bucks
Fawn:Doe 51 ÷ 79 = 0.65 fawns per doe; a 65 percent fawn crop
total fawns ÷ total does
 
Does 8 x 2.72 = 21.76, or 22
different bucks x doe:buck ratio
Fawns 8 x 1.76 = 14.08, or 14
different bucks x fawn:buck ratio
Total population 8 + 22 + 14 = 44
bucks + does + fawns
Deer density 1,000 ÷ 44 = 22.73 acres per deer
acres sampled ÷ total population
 
Bucks 8 ÷ 44 = 18 percent
different bucks ÷ total population
Does 22 ÷ 44 = 50 percent
does ÷ total population
Fawns 14 ÷ 44 = 32 percent
fawns ÷ total population

Additional information

G9481, revised July 2012

G9481 Estimating Deer Populations on Your Property: Camera Survey | University of Missouri Extension

Order publications online at http://extension.missouri.edu/explore/shop/ or call toll-free 800-292-0969.

University of Missouri Extension - print indicia