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Inefficacy of mallard flight responses to approaching vehicles
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Inefficacy of mallard flight responses to approaching vehicles
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Journal Article
Inefficacy of mallard flight responses to approaching vehicles
2024
Overview
Vehicle collisions with birds are financially costly and dangerous to humans and animals. To reduce collisions, it is necessary to understand how birds respond to approaching vehicles. We used simulated ( i.e ., animals exposed to video playback) and real vehicle approaches with mallards ( Anas platyrynchos ) to quantify flight behavior and probability of collision under different vehicle speeds and times of day (day vs . night). Birds exposed to simulated nighttime approaches exhibited reduced probability of attempting escape, but when escape was attempted, fled with more time before collision compared to birds exposed to simulated daytime approaches. The lower probability of flight may indicate that the visual stimulus of vehicle approaches at night ( i.e ., looming headlights) is perceived as less threatening than when the full vehicle is more visible during the day; alternatively, the mallard visual system might be incompatible with vehicle lighting in dark settings. Mallards approached by a real vehicle exhibited a delayed margin of safety (both flight initiation distance and time before collision decreased with speed); they are the first bird species found to exhibit this response to vehicle approach. Our findings suggest mallards are poorly equipped to adequately respond to fast-moving vehicles and demonstrate the need for continued research into methods promoting effective avian avoidance behaviors.
Publisher
PeerJ. Ltd,PeerJ Inc
