
In general, deer whistles only work in a very limited number of traffic situations. The whistles only work at speeds above 30 mph (50 km/h), giving off a high-pitched noise that only deer are able to hear. Whistle sounds are scary for the deer, making them move away from the vehicle.
Do deer whistles on cars really work?
So, if you’re wondering, “how deer whistle works,” or, more importantly, “do deer whistles work,” let’s get right to the point. No. They don’t work. If you don’t really care why they don’t work, scroll ahead to “Nine tips for safely avoiding a collision with deer…” because that info is important for everyone.
Do deer alert whistles really work?
Do deer alert whistles really work? "Unfortunately, there is no hard evidence that deer whistles work – that deer can actually hear the whistles or, if they do, that they're turned away from the road," says Russ Rader, spokesman for the U.S. Insurance Institute for Highway Safety. Understanding when you're most likely to hit a deer is important.
Are deer whistles effective at keeping deer away?
While not 100% guaranteed to work, deer whistles provide some insurance to help you avoid deer while driving. We certainly recommend using them as they are a relatively inexpensive way to help keep deer away from your vehicle. Below we will provide you with some of our favorite deer whistles. This is by far, one of our favorite deer whistles.
Are deer whistles effective in preventing collisions?
The study noted that the responses of the deer seemed to be the same, whether a deer whistle was being used or not. Another university study quoted by the complaint said that “deer whistles are likely not effective in altering deer behavior along roadways to help prevent deer-vehicle collisions.”

At what speed do deer whistles work?
The whistles start to make noise once you're driving between 30 and 35 mph. Some cars, such as EVs, are so silent that deer often bound into traffic before hearing the oncoming vehicle. The whistle supposedly gives the deer advance notice, making it stop and assess its surroundings.
How do you stop deer from hitting your car?
Use high beam headlights if driving at night, when there is no oncoming traffic. The higher light will better illuminate the eyes of deer on or near the roadway. Slow down and blow your horn with one long blast to frighten the deer away. Brake firmly but stay in your lane when you notice a deer in or near your path.
How accurate are deer whistles?
Due to production inconsistencies, most deer whistles don't work properly nor have sufficient sound intensity, making them inaudible to deer. Perhaps even more discouraging, the research also suggests that even if a deer were to hear the sound, it may not change the likelihood of a deer-auto collision.
Where is the best place to put a deer whistle on your car?
the grillMeasure the area in the front of your vehicle to ensure that there is enough room to install the deer whistle. The ideal place is in the grill where the most air flow occurs.
Why do deer always run in front of cars?
When new roads are built in existing deer habitats, the deer may continue to travel their usual routes and distances without understanding that there is any danger. The biggest reason deer jump in front of cars is because they are scared.
What color car hits the most deer?
Believe it or not, research has been done to determine what color car is most likely to hit large animals like deer. Estimates vary but you are between 10% and 47% more likely to hit a deer if you drive a black vehicle rather than any other color car.
Which deer whistle goes on which side?
0:283:17DIY: Installing Deer Warning Whistles! - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo it was very very simple you're supposed to mount it one-third over the way from each side of theMoreSo it was very very simple you're supposed to mount it one-third over the way from each side of the car in the front of the car.
Do ultrasonic repellers work on deer?
Ultrasonic Devices Ultrasonic pest control devices emit high-frequency sounds to deter pests. These sounds are usually too high for the human ear to hear. Ultrasonic deer repellents are a humane and noninvasive deterrent option. Some combine ultrasonic technology with motion sensors and lights to scare deer away.
Do deer whistles affect dogs?
So, the bad news is, deer whistles probably won't be effective on a dog, and you can't really train your dog to hear anything. They either hear it, or they don't. However, there are whistles that are effective when it comes to dog training.
Can humans hear deer whistles?
Deer-whistle manufacturers claim their products emit ultrasonic sounds that deer, but not humans, can hear.
Do deer deterrents work?
They're not 100 percent effective, but close. Repellent sprays and granules, scent stations, sprinklers, and noisemakers are very effective, but a starving deer may bypass those deterrents to eat your garden.
What to do if a deer jumps out in front of your car?
Stay buckled, avoid swerving, heed deer crossing signs, and if you do see a deer, slow down without slamming the brakes and sound the horn. Some people argue that — if a collision is unavoidable — accelerate to shift the vehicle weight to the rear and raise the front angle of the vehicle.
Should you brake before hitting a deer?
If you are going to hit a deer, stay in your lane and brake firmly. Just before you hit the deer, take your foot off the brake. This will cause the nose of your vehicle to come back up, reducing the chance of the deer smashing into your windshield.
Is it safer to hit a deer or swerve?
If it's apparent that a crash is unavoidable, whether it be a deer or other animal crossing the road, do not swerve. Studies show that more serious crashes occur when drivers swerve to avoid an animal. Swerving could cause you to lose control of your vehicle and possibly roll over or hit another car or object.
Are you supposed to speed up to hit a deer?
Don't Speed Up While this might work on some cars, it is generally not a good idea. Reducing your speed will decrease the amount of damage that is done to your car and the chance of injury. Additionally, if you are able to slow down you may be able to avoid hitting the deer entirely.
Why You Should Use Deer Whistles For Cars?
There are a couple of reasons why you should use deer whistles for cars and in this chapter , we are going to explain them in detail.
How Do These Whistles Work?
As we mentioned, the deer whistles for cars are specifically designed whistles that are designed to alert deer on the road when you are passing with your car and avoid crashing into them.
Why do people use whistles on vehicles?
Many motorists confidently rely on vehicle-mounted whistles as their primary means of avoiding deer-vehicle collisions. Aside from being inexpensive and easy to use, manufacturers claim they are “scientifically sound.”. However, research evidence suggests otherwise.
Where were deer whistles invented?
Invented in Austria in 1979, deer whistles are still distributed by many companies in Europe and the United States. Simple air-activated whistles are relatively inexpensive ($5 to $10 apiece online), but electronic systems may cost several hundred dollars. The devices are generally attached to the front of the vehicle, and manufacturers claim they produce ultrasonic frequencies and warn animals of approaching vehicles, thereby reducing deer-vehicle collisions.
How far ahead should deer whistles be?
For deer whistles to be effective, the sound should carry as far ahead and to the sides of a vehicle as possible, so that deer have time to react. Although the Georgia tests were only conducted under ideal weather conditions, the researchers could not transmit ultrasonic frequencies beyond their 10-meter-by-30-meter zone of influence, without damaging the sound-producing equipment. In addition, hearing safety of pedestrians is a factor, and certain laws regulate maximum permissible noise.
How many kHz can a deer hear?
Humans hear best between 2 kHz and 5 kHz, with an upper limit of about 20 kHz. Because deer can detect higher frequencies, the University of Georgia group suggested further research on the use of ultrasonic whistles was warranted.
What is the technique used to test whitetail hearing?
D’Angelo’s group used a technique called auditory brainstem testing to assess whitetail hearing capability. This involved strategically placing electrodes on the head of drug-immobilized deer, testing the animal’s brain response to various sound frequencies and displaying the electrical responses on a monitor for analysis.
How did the Heffners obtain behavioral audiograms?
The Heffners, from the Whitetail Deer Research LLC, Ohio, obtained behavioral audiograms of two captive deer using a “conditioned-suppression avoidance procedure.” In simple terms, they conditioned thirsty deer to drink from a metal bowl that was wired to present a mild shock. Sounds of various (pure tone) frequency were then presented at random intervals followed by a mild electric shock. A deer avoided the shock by breaking contact with the bowl, thereby indicating that it had heard the sound frequency tested.
What is a vehicle whistle?
Vehicle-mounted whistles — technically referred to as auditory deterrents, but more commonly called deer whistles — are probably one of the most popular. Many motorists confidently rely on vehicle-mounted whistles as their primary means of avoiding deer-vehicle collisions. Aside from being inexpensive and easy to use, manufacturers claim they are “scientifically sound.” However, research evidence suggests otherwise.
How Do Deer Whistles Work?
People seem to like them because they are a cheap method of potentially frightening deer off the road. They work by creating a high pitch whistle because of the air flow from your moving vehicle. In the past few years, electronic deer whistles have also come onto the market.
How many deaths are caused by deer whistles?
This causes around 150 deaths a year, several thousand injuries and over $1 billion in damage to cars. One cheap and popular option that has been around for about 20 years is the deer whistle. It can easily be mounted onto any vehicle and provides, so the manufacturers say, a warning to any nearby animal to stay off the road.
Why are deer collisions increasing?
It’s most likely that deer collisions are set to increase in the future because of the growing deer population and the higher number of cars on the road. There is little or no concrete evidence that deer whistles provide a suitable deterrent and effectively reduce the number of collisions.
What do deer hear?
What Deer Hear. Sound travels in waves and is characterized by two factors: the frequency and the amplitude. Frequency is how close the waves are together. The narrower the distance, the higher pitched the sound. Amplitude determines the loudness which means that larger waves are noisier than smaller ones.
How many kHz do deer hear?
Discovering what deer (or any other animals for that matter) are likely to hear is not a simpleonly between 1 and 8 kHz, which corresponds to the sounds they are likely to make individual and as a in certain circumstances.
Why is defensive driving important?
Many experts believe that a far more useful approach is better education for drivers and that more defensive driving is key to reducing the number of accidents in the long term. For example, being aware that more deer tend to be on the road around dusk and dawn and that sighting one deer usually means there are more around the corner as they travel in packs. Using your high beams when on a country road can also help you see animals on the road in time, particularly in heavily wooded areas.
When does deer population increase?
The deer population increases dramatically in the Fall between October and December.
What are deer whistles?
Vehicle-mounted auditory deterrents, aka deer whistles, are a popular way for motorists to take action. These devices are readily available, inexpensive, and easy to install. Manufacturers tout ultrasonic sound waves that are undetectable by humans but scientifically proven to warn wildlife away from approaching traffic.
How to avoid deer collisions?
The only proven measures drivers can take to reduce the chance of deer-vehicle collisions and lessen the severity of those that do occur are: 1 Buckle Up - the safest place to be in any accident is inside the car so be sure you stay there. 2 Slow Down - especially when driving at dawn and dusk in areas known to be rife with deer. 3 High Beams - at night, in the absence of oncoming traffic, provide the best possible visibility. 4 Scan Shoulders - you’re more likely to see deer in time to respond if you watch the areas where they congregate. 5 Don’t Swerve - it’s unlikely you’ll save the animal and you’ll probably make things worse for yourself, your passengers, and other drivers.
What are the best ways to reduce the chance of deer collisions?
The only proven measures drivers can take to reduce the chance of deer-vehicle collisions and lessen the severity of those that do occur are: Buckle Up - the safest place to be in any accident is inside the car so be sure you stay there.
When to slow down when driving?
Slow Down - especially when driving at dawn and dusk in areas known to be rife with deer.
Do deer hear?
As any hunter knows, and as research has confirmed, deer have sensitive hearing. Moreover, vehicles make noise as they motor down the road. Even electric vehicles, which are practically mute compared to an internal combustion engine, create wheel and tire noise. When a car is coming the deer know.
Can you save an animal if you don't swerve?
Don’t Swerve - it’s unlikely you’ll save the animal and you’ll probably make things worse for yourself, your passengers, and other drivers.
Can deer survive a car collision?
It goes without saying that deer rarely survive a confrontation with a car, at least not for long. Human fatalities are less common but they do occur, along with injuries and, of course, damage to the vehicle.
How much do deer whistles cost?
They're called deer whistles and can be purchased for less than $10 online or at an auto shop. Once attached to the front bumper or grill of your car, they're supposed to emit a sound that alerts deer and scares them off. Heriford said he sees them on customers' cars.
Who said he sees them on customers' cars?
Heriford said he sees them on customers' cars.
Do deer whistles hurt?
Still, with a price point under $10, some drivers think having the whistles can't hurt.
Can deer hear whistles?
Researchers tested six different whistles, finding deer can hear them, but it's likely too late.
Can deer whistles be used to stop collisions?
A 2007 study from the University of Georgia also found deer whistles are "likely not effective in altering deer behavior along roadways to prevent collisions."
