High-frequency and high-amplitude sounds enhance bird deterrence

Area of Science:

• Ornithology
• Acoustic Ecology
• Wildlife Management

Background:

• Human-bird conflicts are increasing in agricultural, airport, and energy sectors.
• Artificial sounds are a common bird deterrence method, but sound frequency effects lack systematic study.
• Black-necked cranes (Grus nigricollis), a protected species, interact with human agricultural activities.

Purpose of the Study:

• To investigate the impact of artificial sound frequency and combinations on black-necked crane behavior.
• To determine effective sound parameters for bird deterrence.
• To inform wildlife conservation and human-wildlife conflict management strategies.

Main Methods:

• Designed and tested various sound frequencies and combinations.
• Conducted deterrence experiments on black-necked cranes in their wintering grounds.
• Analyzed behavioral responses, escape distances, and escape speeds.

Main Results:

• High-frequency and highly variable sounds significantly improved deterrence effectiveness (behavioral response, escape distance, speed).
• No significant differences were observed in responses based on flock type or age composition.
• High-frequency or high-variability sound combinations achieved efficient short-term bird deterrence.

Conclusions:

• High-frequency, highly variable sounds are recommended for short-term black-necked crane control.
• This study provides a scientific basis for refining bird deterrence strategies for various species.
• Effective sound-based deterrence can mitigate human-wildlife conflicts and aid conservation efforts.