Presentation Details
| Artificial light at night alters flight trajectories of insects in the field Kate Otter1, Samuel T.Fabian2, Jamie C.Theobald3, Yash Sondhi1. 1Case Western Reserve University, Cleveland, OH, USA.2University of Oxford, Oxford United Kingdom.3Florida International University, Miami, FL, USA |
Abstract
Artificial light at night (ALAN) alters the behavior of flying insects, often producing flight patterns such as spiraling, stalling, or orbiting that can trap insects near lights. Whether insects are attracted to lights or become entrapped due to altered flight once in the illuminated region remains unclear. We used high-speed video recordings of nocturnal insects in Costa Rica. Two synchronized cameras positioned above a light source, we recorded short video sequences throughout the night. The light alternated between on and off conditions, allowing us to compare insect abundance and flight behavior in illuminated and dark conditions. We reconstructed trajectories in 3D to measure metrics including path straightness and turning angles relative to the light. ALAN did not increase the number of insects detected, but reduced path straightness, causing insects to spend more time near the light. Understanding these behavioral drivers will improve predictions of ALAN’s ecological impacts and inform mitigation strategies.
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No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author.
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