Home > Columns > The Rut


NatureSmart Column

The Rut

Photo by Stan Tekiela

by Stan Tekiela
© NatureSmart

December 27, 2021

Yet another White-tailed Deer (Odocoileus virginianus) mating season is behind us now. This year I spent a truckload of time in the woods following several large bucks who were actively searching for mates. I was able to capture a pile of images of the most interesting mating behavior.

The mating season, also known as the rut, for White-tailed Deer lasts about 3 weeks in the northern states. The rut starts in mid-October and runs through mid November. Several research studies show that the timing of the rut is influenced by the lunar (moon) phases. It seems that the rut peaks about seven days after the second full moon during Oct and November.

I find the word “rut” to be a funny word that is used for describing the mating season. It turns out that the word rut comes from the Latin word “rugire” meaning “to roar”. Presumably it’s a reference to some animal species such as the Elk where the male bugles or roars to proclaim possession of a harem of females.

During the rut, the male White-tailed Deer experiences a huge increase in testosterone rushing through his blood stream which boosts aggressiveness, leading to fights with other males to establish dominancy or access to females. Even young bucks with tiny antlers engage in these sparring matches. In addition to fighting the big bucks will also rub their antlers on tree trunks. This often results in stripping the bark off the young tree. They will also thrash their antlers around in a low growing shrub, often breaking off the branches.

In both deer and elk species, the males will mark themselves with mud or urine during the rut. Last month, while filming Elk during the rut in Montana, several of the bull Elk rolled in mud or completely submerge themselves in muddy water. It appeared to me that the most dominant males didn’t used mud coatings but instead urinated across their own belly and down their hind legs. Either way it seems the males are going to extraordinary measures to show off for the females.

Speaking of hind legs, the inside portion of the leg at the bend of the ankle, is where one of the largest scent glands is located on the White-tailed Deer. It gives off a strong musky odor that you can smell if you get close to a rutting male. Every year when I am out with the deer during the rut I marvel when I get a whiff of the males rutting perfume. It’s a sweet yet pungent order that once you smell it you will never forget it.

Female White-tailed Deer are called does. While the male can be ready to mate for several weeks before the rut and several weeks after, the does are only in estrus (ready to mate) for only about 72 hours. This narrow window of time means the male needs to get his timing just right. Since each female comes into estrus on her own schedule, the male is constantly on the move traveling over great distances looking for each doe that is in estrus.

Many books state that the bucks don’t eat during the rut because they are too busy chasing after females or fighting other males. I can tell you with 100 percent certainty that the bucks do stop and eat while chasing does. The bucks don’t eat as much as they normally would, so they do lose weight during the rut, but they are definitely eating.

Some research shows a breeding buck losses as much as 20 to 25 percent of its body weight during the rut. So, on average a breeding buck which weights about 180 pounds can lose about 30 to 40 pounds in just a month or two. In the post-rut the buck often spends an extraordinary amount of time eating and just laying down and recovering.

One thing is for sure about the White-tailed Deer rut. I already can’t wait for next year when the leaves change color and the Elk and the White-tailed bucks are back in the rut. Until next time…

Stan Tekiela is an author / naturalist and wildlife photographer who travels the U.S. to study and capture images of wildlife. He can be followed on Instagram, Facebook and Twitter. He can be contacted via his web page at naturesmart.com. 


The nationally syndicated NatureSmart Column appears in over 25 cities spanning 7 states: Minnesota, Wisconsin, Michigan, Illinois, Ohio, New York and Pennsylvania. It is a bi-weekly column circulated to over 750,000 readers.

Recent Columns
Most RecentAbout Stan's Columns

Trumpeter Swan

Recently I have been spending some time photographing a pair of Trumpeter Swans (Cygnus buccinator) with six little cygnets. This swan family is not in a wilderness setting but a suburban backyard pond. Wow, have things changed. First, when I started my career in wildlife photography 40 years...

American Redstart

The key to “seeing” nature is to stop and look. I know that seems rather obvious but it’s true. The simple act of stopping and looking is really all it takes to start to see more nature. This is something I learned a long time ago, but it seems that I need to stop and remember...

Not always what it appears to be

Not everything in nature appears the way you see it! I’ve said it over and over again in various ways. We see the natural world through the lens of a human and all the things that go into being a human. This is not a bad thing, but it is important to understand the lens colors the way in...

Ruffed Grouse

I am fascinated by the diversity of mother nature. And this was abundantly clear to me the other day while I sat in a tiny chair blind, in the dark, waiting for the sun to come up and for a Ruffed Grouse to enter the habitat that lay before me.

The grouse of the world are one of the more...

Wildlife Photography Tours

Each year, during June and July, Stan Tekiela offers two world-class wildlife photography tours. Here's your chance to learn some tricks of the trade from a top professional.

» More Info

View all of the titles in the
NatureSmart Bookstore

Check out Stan's latest photos at
NatureSmart Wildlife Images

Do you have any interesting wildlife in your backyard? Any nesting birds, deer, turkeys, reptiles, amphibians, or other unique wildlife? Or maybe a fox or coyote den?

If so, contact Stan at stan@naturesmart.com with your backyard wildlife. If he can get a good photo of the subject, he will send you a print of the photo to hang on your wall.

» More Info

Order Prints and posters of Stan's photos at
» Prints & Posters

Hear Stan on radio stations all across the Midwest.
» More Info