There are several types of bird scarers used in Australia, including:

Gas cannons: These are loud noise-making devices that emit loud booms at regular intervals to scare bird wildlife away from crops.

Bird distress calls: These are pre-recorded bird calls played through speakers to simulate the sound of birds in distress, causing bird wildlife to flee the area.

Visual deterrents: These include reflective tape, balloons, and kites designed to create visual disturbances and discourage bird wildlife from settling in an area.

Scarecrows: Traditional scarecrows are still used in some areas as they can effectively scare bird wildlife by their appearance.

Laser bird repellents: This new technology uses lasers to scare bird wildlife away by projecting a laser beam that moves and creates a visual deterrent.

The effectiveness of bird scarers can vary depending on the type of bird species, the location, and the method used. Some methods may be more effective for certain types of bird species than others. However, overall, the effectiveness of bird scarers can be improved by rotating the use of different types of bird scarers and by changing their location periodically.

The effectiveness of bird scarers can vary depending on several factors, such as the species of bird, the location, and the method used. However, when used appropriately, bird scarers can effectively reduce crop damage caused by bird wildlife.

It is important to note that some bird scarers, such as gas cannons, can be quite loud and may cause stress to bird wildlife in the area. Additionally, the use of bird distress calls can be controversial as it can disrupt natural bird behaviour and communication patterns.

When it comes to harming birds, it is important to use bird scarers appropriately and in accordance with local regulations. For example, some visual deterrents like reflective tape can harm birds if they become entangled in them. It is important to regularly check and maintain bird scarers to ensure they are not causing harm to birds. In general, it is recommended to use non-lethal methods of bird control and to minimise any potential harm to birds.