Tracking Deer Providing Valuable CWD Information

Tracking Deer Providing Valuable CWD Information
In Minnesota, researchers hope tracking GPS-collared deer will help them understand how natural dispersal impacts CWD transmission. (Photo courtesy of A. Spaulding & Minnesota DNR)

When deadly Chronic Wasting Disease was found in southeastern Minnesota’s Fillmore County in 2016, state wildlife officials saw a need to study the possible role of wild deer dispersal in CWD’s spatial spread. As of Oct. 31, 19 whitetails in Deer Permit Area 603 had tested positive for the disease.

A multi-year study that began last March involves using nets fired from helicopters to capture deer, fit them with GPS collars and release them back into the wild. Researchers then track the movements of each deer by satellite.

The study began with netting, collaring and releasing 109 deer. According to Dr. Chris Jennelle, research scientist for the Department of Natural Resources, early data have shown interesting dispersal — especially among “juvenile females” (doe fawns). In fact, to date the two widest roamers have been doe fawns; one moved approximately 77 miles (straight line) from her winter range, while the other traveled 40 miles.

“The average spring dispersal distance of juvenile females thus far has been 19 miles,” Dr. Jennelle notes. “But excluding the two outliers, the average falls to six miles. Juvenile males dispersed an average of nine miles, with one traveling 23 miles.”

The extreme travelers in each group skewed the data, due to the low number of deer being tracked, Still, 40 percent of doe fawns moved in excess of three miles from their winter range, while 28 percent of buck fawns did so.  

“Preliminary analysis suggests juvenile does disperse at similar rates to juvenile bucks in spring,” the researcher says. “Some (doe fawn) dispersal may be due to high densities and the influence of matriarchal does.”

At last report, 48 deer that were fawns when captured — 19 does and 29 bucks — still had functioning GPS collars. Dr. Jennelle says plans to continue collaring and tracking another 65 or so deer (roughly equal numbers of each sex) will add to confidence in the data set. The next captures are scheduled to occur in January.

More Information

This study received start-up funding from the Environment and Natural Resources Trust Fund, overseen by the Legislative-Citizen Commission on Minnesota Resources. For more on the research, visit: and search for “deer movement study."

Popular Videos

Food Plots and Dogs

On this edition of "Deer Dog," Jeremy Moore discusses how to connect food plots to deer and your deer dog.

Deer Factory: Minnesota Property Overview

James Kroll and Pat Hogan begin a new Deer Factory project in west central Minnesota.

Stan Potts' Debut NAW Hunt

North American Whitetail revisits Stan Potts' very first hunt for the TV Show.

See more Popular Videos

More Deer Behavior & Facts

Deer Behavior & Facts

Dr. Deer: When Bucks Become Nocturnal


James Kroll explores how age affects buck behavior, particularly when they may become more

Deer Behavior & Facts

Know the Sounds of Deer Hunting Success

Gordon Whittington - December 07, 2016

I hadn't yet thrown in the towel, but I was in the middle of my windup. When you've spent over...

Deer Behavior & Facts

Facts About Deer Vision and How It Can Help Us Succeed

Bob Humphrey

What exactly do deer see? Author Bob Humphrey dives into the fine details behind deer vision,...

See More Deer Behavior & Facts

GET THE MAGAZINE Subscribe & Save

Temporary Price Reduction


Give a Gift   |   Subscriber Services


GET THE NEWSLETTER Join the List and Never Miss a Thing.