Reactions of waterfowl (Anatidae) to the sounds of UAVs

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Key Points

This research aims to evaluate if UAV rotor sounds serve as avoidance factors for waterfowl.
Audio recordings of rotor sounds were played to waterfowl flocks to observe their reactions.
Distance to the flock was measured, and a rotor sound attenuation model was used to estimate sound levels heard by the flocks.
Responses were documented to analyze avoidance behavior in relation to sound intensity.
Rotor sounds below approximately 50 dB were not considered effective as avoidance signals for waterfowl.
Avoidance behavior primarily resulted from visual cues such as the UAV's approach.
Some species indicated that louder rotor sounds could independently act as avoidance signals.

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Assesses waterfowl responses to UAV sounds, suggesting visual cues are primary avoidance factors.

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Takahashi et al. (2023) studied this question.

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