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Web Blog - EASYTEK New Zealand

The Official EASYTEK New Zealand Blog

Cat Deterrents

Cat Deterrents that Work

A guide to intelligent cat deterrents to keep your home and garden free from stray and feral cats. We cover acoustic ultrasonic devices, smell and taste repellents as well as automatic water sprinklers.

  • Ultrasonic Cat Deterrents
  • Smell and Taste Aversions
  • Automatic Water Sprinklers


Ultrasonic Cat Deterrents

How and why they work

Ultrasonic products stop stray and feral cats from using your lawn or garden as a toilet.

Ultrasonic cat deterrents emit an acoustic sound that is above the hearing range of most humans but perfectly audible to the cat. The cat associates the burst of ultrasonic sound with the location and learns to avoid the area in the future.

When choosing an ultrasonic cat deterrent make sure that the product has a motion sensor that automatically senses the cat and conserves energy.

Do ultrasonic cat deterrents always work?

Ultrasonic cat deterrents work with most cats. There is always the occasional cat that suffers from hearing loss or damage that will not respond to ultrasonic sound. Choose a quality product is also important because these products have usually been tested with various cat breeds and provide a stable frequency and sound output over the lifetime of the product.


  • Works with most cats
  • Inaudible to humans
  • Covers small and medium-sized areas
  • Works in any weather


  • Does not work with deaf cats


Product example

Ultrasonic Cat Deterrent

Automatic Outdoor Cat Deterrent

RSPB-endorsed Ultrasonic Cat Deterrent

Smell and Taste Aversions

Commercial and home-made cat repellents

A popular recipe to deter your neighbour's cat is using a smell or taste aversion product. These come either as spray or liquid. There are also a number of homemade recipes available online which often include some form of pepper, hot chili etc.

While some (but not all) taste aversion products work, there is one major problem with them: They do need frequent reapplication, e.g. after rain or snow.

When choosing an ultrasonic cat deterrent make sure that the product has a motion sensor that automatically senses the cat and conserves energy.


  • Easy to use and apply


  • Not all taste aversion products work
  • Requires reapplication after rain
  • Difficult to apply and costly for larger areas


Product examples

Various commercial products are available as well home recipes. Google 'cat smell deterrents' for more information.

Automatic Water Sprinklers

Great fun and versatile solution

Everybody know that cats hate water. So why not use this know how to keep them away from sandpits, gardens, flower and veggie beds?

Automatic water sprinklers consist of a motion detector that senses movement of the offending cat. When the cat comes into range it simply turns on the sprinkler for a few seconds.

Commercial products use a combination of a startling blast of water together with a sudden unexpected noise to create a memorable and unpleasant experience for the offending cat.

Similar to ultrasonic cat deterrents, the animal associates this unpleasant experience with the area and learns to avoid similar surprises in the future. The major advantage of a water sprinkler over an acoustic product is that these work even with deaf cats (as long as the cat hates am unexpected blast of water which nearly all cats do).


  • Works with all cats (including deaf cats)
  • Can be used for other animals, e.g. rabbits, possums, racoons, dogs etc
  • Covers small and medium-sized areas
  • Works in any weather
  • Great fun to watch


  • Not suitable in freezing conditions
  • Most commercial products require a connection to a water tap


Product example

Automatic Water Sprinkler Cat Deterrent

Regional Bird Songs


Birds sing with regional accents.

The targeted bird species and different bird accents are important considerations when choosing an acoustic bird control system. For example to successfully deter New Zealand Black-backed Gulls from a Marina environment, an acoustic bird deterrent system requires programming of bird songs different to those used to control American Ring-billed Gulls.


Easytek New Zealand programs and customises all its acoustic bird deterrent systems for use with local bird species and New Zealand environments. You can learn more about our systems on the Easytek New Zealand website.

Bird Management Programs

How to manage Pest Birds?

Research and practical experience have shown that Bird Control is most effective if different methods such as bird roost inhibitors, netting, visual and sound bird deterrents are being used in combination.

  • Bird Roost inhibitors are a simple but very effective bird control weapon. For example, bird spikes prevent birds from landing on their most popular spots such as roof ridges, ledges, Chimneys and other places.
  • Bird netting is commonly used by farmers and gardeners to protect crops from bird damage. Netting is also being used to exclude birds from buildings, historic facades, warehouses or industrial plants.
  • Visual bird scarers have a long history in bird control. The first Scare Crows were being used hundreds of years ago. Today’s products combine space age technology such as holographic effects with frightening sounds to effectively scare away pest birds. Advanced light and laser bird repellers chase away pest birds with constantly changing light patterns.
  • Acoustic bird deterrent systems include gas guns and bio-acoustic scare devices. These systems aim to create a permanent danger or 'no-go' zone by emitting either species-specific alarm and distress bird calls, predator cries or sound harassments. Many of these devices have adjustable features such as intermittent sound, different volume levels or automatic day/night operation. They are frequently used in open outdoor areas such as farm fields, orchards, vineyards, on boats, roof tops or inside warehouses, hangars, sheds and other buildings.

Bird management in vineyards is essential to limit crop loss.

In order to solve a serious bird problem experts often recommend using a bird management program. An effective bird management program includes a combination of the above bird control methods.

For example, bird infestations in warehouses and storage facilities can be targeted with a combination of bio-acoustic bird repellers and a visual bird scarer such as a laser system.

Pigeons are a common problem.

Bird exclusion netting and large area acoustic bird deterrents (e.g. gas guns and/ or bio-acoustic systems) are commonly being used to protect grapevines from bird damage.

We can help with creating an effective bird management program tailored to your needs and bird pest situation. If you would like a recommendation feel free to get in touch with us via the 'Contact' form on top of this page.