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Mechanical Deer Deterrents


If deer pressure is high, chemical repellents may not be enough. Mechanical deterrents can be used in combination with liquid repellents or used alone. There are several products recommended for deer control that don't fall under the catagory of either repellents, or fencing.

Scare Devices


 Wireless Deer Fence™  - Each unit has a scent reservoir with a perfumed oil that is attractive to deer. When deer investigate, they receive a small electric shock. The deer learn to avoid them, so you'll need to keep moving the units, but they're easy to move. Powered by two AA batteries, the shock is humane but strong enough to startle the hungry deer.

The Havahart® Electronic Repellent for Deer - uses a technology that attracts deer to posts with a lure scent. Then repels deer from your yard or garden with an slight electronic shock less than a static shock might be. It is extrememly similar to Wireless Deer Fence.

The Scarecrow™  - This motion-activated sprinkler attaches to the garden hose. Just hook it up to your garden hose, plug in the 9-Volt battery and then place the stake in the ground near area to be protected. When an animal is seen, a valve opens, and instantly releases a three-second pulsating spray of water. The combination of the sudden noise, movement, and water frightens animals away.  Is s a clean and alternative to repellant, but is limited to the distance the water can spray.  Both a pro and con is that it is motion activated sensing motion and heat the same way security lights work.  This motion could be deer, your dog or cat, or you. One scarecrow can cover up to 1,000 square feet.

Scarecrow Motion Activated Sprinkler

Scarecrow Motion Activated Sprinkler


DeerChaser®
the motion sensor on this DeerChaser® activates, causing it to sound a loud, high-frequency noise, and flash a bright 2-LED light; continues for 2-15 minutes (adjustable) past the last motion detected. Senses movement in a 120? area, up to 25' away. Works day and night. Safe around pets. Three "D" batteries (not included) last up to three months, depending on activation length and setting. Weatherproof housing includes mounting bracket, and measures 4"x10-14".

DeerChaser® Deer Repeller

DeerChaser® Deer Repeller

Scare Wars® uses radio and computer technology to operate LP gas cannons. It is marketed as the best wildlife deterrent on the market today because the cannons only go off when a deer or other wildlife is sighted. This way the deer never get used to it going off. Because of expense, it is suggested for commercial nurseries and orchards.

Ultrasonic units -These devices emit an ultrasonic pulse that startles deer. The timing, duration and frequency of the sound changes randomly so deer don't get used to any particular sound Yard Guard Ultrasonic Deer Repeller Yard Guard Ultrasonic Deer Repeller


Yard Guard Ultrasonic Deer Repeller This electronic yard protector keeps animals away from your property without messy or expensive chemical solutions and provides coverage up to 4000 square feet. Proven sound technology repels a number of unwanted pests. Motion sensor triggers ultrasonic blasts in battery mode to save battery. Repels dogs, cats, deer, raccoons, skunks,deer, and other pests. Adjustable frequencies for different pests.




Critter Blaster Pro Electronic Animal Repellent- Probably best suited for commercial use, but could be used in urban areas, the Critter Blaster electronically produces eight different sounds of animals in distress or sounds that harass animals and keep them away. It was designed for farms, vineyards, and other large commercial producers.  Critter Blaster is programmable and constantly changes the noises it produces. Said to repel deer, raccoons, dogs, foxes, rodents, and other critters.  Has adjustable volume controls, four speakers, and runs on electricity.


  GuardenerTM  is equipped with 2 ways to deter deer. First, it issues an ultrasonic alarm which can only be heard by the animals, and a pressurized water jet that will scare the deer. The device uses a motion sensor to detect the presence of nearby animals. You can set the detecting area by adjusting the sensitivity knob. Detection range can be adjusted from 15 to 25 feet. Different weather conditions may slightly alter ranges.A unique feature of The Guardener is that it uses both ultrasound and water blast to repel animals. The sprinkler can rotate up to 170 degrees and shooting pressurized water as far as 17 to 22 feet. It has a built in tank that can hold about 3.5 gallons of water.  It is solar powered so there is no need for electricty or batteries.

Do It Yourself
The following is an excerpt from an internet article on building your own deer sensor.

My original "Deer Repellent/ Seismic Sensor" recommended using a speaker with a weight glued to the cone as a vibration sensor (see bottom of page) but it recently occurred to me that the speaker could supply the mass itself. ...........It will take a minute or so before the circuit reaches full sensitivity. But then the slightest jarring of the jar will ring the bell! The circuit will take a while to recover after a trigger, too. To protect a large area with the sensor set it over a pipe buried just beneath the surface. A footstep anywhere along the pipe will shake the sensor. ........

Read all about making your own deer detector


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