{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,14]],"date-time":"2026-07-14T18:07:46Z","timestamp":1784052466842,"version":"3.55.0"},"reference-count":67,"publisher":"Public Library of Science (PLoS)","issue":"7","license":[{"start":{"date-parts":[[2026,7,14]],"date-time":"2026-07-14T00:00:00Z","timestamp":1783987200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100006233","name":"National Renewable Energy Laboratory","doi-asserted-by":"publisher","award":["DE-AC36-08GO28308"],"award-info":[{"award-number":["DE-AC36-08GO28308"]}],"id":[{"id":"10.13039\/100006233","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS One"],"abstract":"<jats:p>Wind turbines intersect airspace used by both migratory birds and bats, yet most monitoring approaches rely on single sensing modalities that capture only part of this system. Here, we integrate synchronized three-dimensional (3-D) thermal videography, ultrasonic acoustic monitoring, and regional weather radar data to characterize wildlife activity at two inland wind turbines during fall migration in Iowa, USA. Across 38 nights in late summer and autumn of 2022, we recorded 12,047 3-D flight tracks within rotor-swept altitudes, 2,249 bat echolocation sequences, and cumulative radar-derived migration traffic of approximately 2.0 million birds\/km. Thermal video detections were strongly correlated with radar-derived migration intensity but not with acoustic detections. This pattern is consistent with birds comprising the majority of thermal video detections during peak migration. Thousands of flight trajectories occurred within 30\u2013150 m above ground level and within 200 m of turbine monopoles, demonstrating frequent use of altitudes associated with collision risk. Fine-scale trajectory analysis revealed strong avoidance of flight paths directed toward the rotor-swept zone (RSZ), with targets 3.6 times more likely to fly toward the RSZ when turbines were stationary than when producing power. Angular divergence from turbine bearing also increased with decreasing distance, with a steeper avoidance gradient near operating turbines, consistent with birds actively responding to cues associated with blade rotation. Our results demonstrate how a sensor-fusion framework improves inference about taxonomic composition, airspace use, and behavioral responses near wind turbines. The strong relationship between regional radar activity and turbine-level detections highlights the potential of publicly available radar data to support wind energy siting by identifying areas with lower migratory bird traffic without extensive on-site monitoring. Understanding the sensory basis of the avoidance behavior documented here could also inform the design of deterrent systems for infrastructure where bird collisions are a concern. Integrating complementary monitoring technologies provides a scalable approach for understanding wildlife\u2013turbine interactions and guiding responsible wind energy development.<\/jats:p>","DOI":"10.1371\/journal.pone.0352329","type":"journal-article","created":{"date-parts":[[2026,7,14]],"date-time":"2026-07-14T17:30:33Z","timestamp":1784050233000},"page":"e0352329","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":0,"title":["Integrating 3-D thermal videography, ultrasonic acoustics, and weather radar to characterize bird and bat activity at wind turbines"],"prefix":"10.1371","volume":"21","author":[{"given":"Abigail","family":"Shultz","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Donald","family":"Solick","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0694-3830","authenticated-orcid":true,"given":"Michael","family":"Whitby","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian","family":"Newman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1457-3689","authenticated-orcid":true,"given":"Aaron","family":"Corcoran","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2026,7,14]]},"reference":[{"key":"pone.0352329.ref001","volume-title":"Summary of bat fatality monitoring data contained in AWWIC","author":"T Allison","year":"2020","edition":"2"},{"issue":"8","key":"pone.0352329.ref002","article-title":"An evaluation of bird and bat mortality at wind turbines in the Northeastern United States","volume":"15","author":"DY Choi","year":"2020","journal-title":"PLoS One"},{"key":"pone.0352329.ref003","volume-title":"Summary of bird fatality monitoring data contained in AWWIC","author":"E Schauber","year":"2025","edition":"3"},{"issue":"6","key":"pone.0352329.ref004","doi-asserted-by":"crossref","DOI":"10.1016\/j.heliyon.2021.e07251","article-title":"Post-construction bird and bat fatality monitoring studies at wind energy projects in Latin America: A summary and review","volume":"7","author":"MS Agudelo","year":"2021","journal-title":"Heliyon"},{"issue":"7","key":"pone.0352329.ref005","doi-asserted-by":"crossref","DOI":"10.1371\/journal.pone.0067997","article-title":"Estimating bat and bird mortality occurring at wind energy turbines from covariates and carcass searches using mixture models","volume":"8","author":"F Korner-Nievergelt","year":"2013","journal-title":"PLoS One"},{"issue":"8","key":"pone.0352329.ref006","doi-asserted-by":"crossref","first-page":"2449","DOI":"10.2193\/2007-270","article-title":"Assessing impacts of wind-energy development on nocturnally active birds and bats: A guidance document","volume":"71","author":"TH Kunz","year":"2007","journal-title":"J Wildl Manage"},{"issue":"4","key":"pone.0352329.ref007","doi-asserted-by":"crossref","first-page":"685","DOI":"10.1002\/jwmg.21844","article-title":"Effects of wind turbine curtailment on bird and bat fatalities","volume":"84","author":"KS Smallwood","year":"2020","journal-title":"J Wildl Manage"},{"key":"pone.0352329.ref008","unstructured":"Next Generation Weather Radar (NEXRAD). National Oceanic and Atmospheric Administration (NOAA) [Internet]. [cited 2026 Feb 24]. Available from: https:\/\/www.ncei.noaa.gov\/products\/radar\/next-generation-weather-radar"},{"issue":"1","key":"pone.0352329.ref009","doi-asserted-by":"crossref","first-page":"20","DOI":"10.1002\/rse2.92","article-title":"Automated detection of bird roosts using NEXRAD radar data and Convolutional Neural Networks","volume":"5","author":"C Chilson","year":"2019","journal-title":"Remote Sens Ecol Conserv"},{"issue":"4","key":"pone.0352329.ref010","doi-asserted-by":"crossref","DOI":"10.1111\/conl.12887","article-title":"Using weather radar to help minimize wind energy impacts on nocturnally migrating birds","volume":"15","author":"EB Cohen","year":"2022","journal-title":"Conserv Lett"},{"key":"pone.0352329.ref011","doi-asserted-by":"crossref","first-page":"76","DOI":"10.1111\/j.1474-919X.2006.00509.x","article-title":"Remote techniques for counting and estimating the number of bird\u2013wind turbine collisions at sea: a review","volume":"148","author":"M 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bats to operating wind turbines","volume":"72","author":"JW Horn","year":"2008","journal-title":"J Wildl Manage"},{"key":"pone.0352329.ref026","author":"AJ Corcoran","year":"2021"},{"issue":"1","key":"pone.0352329.ref027","doi-asserted-by":"crossref","first-page":"92","DOI":"10.1111\/nyas.15143","article-title":"Application of a novel deep learning-based 3D videography workflow to bat flight","volume":"1536","author":"J H\u00e5kansson","year":"2024","journal-title":"Ann N Y Acad Sci"},{"issue":"14","key":"pone.0352329.ref028","doi-asserted-by":"crossref","first-page":"5825","DOI":"10.1109\/JSEN.2019.2907399","article-title":"Three-Dimensional Localization of Bats: Visual and Acoustical","volume":"19","author":"K Hochradel","year":"2019","journal-title":"IEEE Sensors J"},{"key":"pone.0352329.ref029","doi-asserted-by":"crossref","first-page":"101069","DOI":"10.1016\/j.ecoinf.2020.101069","article-title":"ThermalTracker-3D: A thermal stereo vision system for quantifying bird and bat 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Overview of knowledge including effects of configuration. 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RStudio: Integrated Development Environment for R [Internet]. Boston (MA): Posit Software, PBC; 2023. Available from: https:\/\/posit.co\/"},{"key":"pone.0352329.ref056","unstructured":"R Core Team. R: A Language and Environment for Statistical Computing [Internet]. Vienna, Austria: R Foundation for Statistical Computing; 2023. Available from: https:\/\/www.R-project.org\/"},{"key":"pone.0352329.ref057","author":"C Agostinelli","year":"2024"},{"issue":"3","key":"pone.0352329.ref058","doi-asserted-by":"crossref","first-page":"1","DOI":"10.18637\/jss.v040.i03","article-title":"Dates and times made easy with lubridate","volume":"40","author":"G Grolemund","year":"2011","journal-title":"J Stat Softw"},{"key":"pone.0352329.ref059","author":"H Wickham","year":"2023"},{"key":"pone.0352329.ref060","author":"H Wickham","year":"2024"},{"key":"pone.0352329.ref061","doi-asserted-by":"crossref","DOI":"10.1007\/978-3-319-24277-4","volume-title":"ggplot2: Elegant Graphics for Data Analysis","author":"H Wickham","year":"2016"},{"key":"pone.0352329.ref062","author":"PK Dunn","year":"2026"},{"issue":"1","key":"pone.0352329.ref063","doi-asserted-by":"crossref","first-page":"1","DOI":"10.18637\/jss.v067.i01","article-title":"Fitting linear mixed-effects models using lme4","volume":"67","author":"D Bates","year":"2015","journal-title":"J Stat Softw"},{"key":"pone.0352329.ref064","doi-asserted-by":"crossref","DOI":"10.1201\/9781315370279","volume-title":"Generalized additive models: an introduction with R","author":"SN Wood","year":"2017","edition":"2"},{"issue":"1","key":"pone.0352329.ref065","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1002\/wsb.260","article-title":"Comparing bird and bat fatality-rate estimates among North American wind-energy projects","volume":"37","author":"KS Smallwood","year":"2013","journal-title":"Wildl Soc Bull"},{"issue":"2","key":"pone.0352329.ref066","doi-asserted-by":"crossref","DOI":"10.1007\/s00265-018-2447-0","article-title":"Contrasting aspects of tailwinds and asymmetrical response to crosswinds in soaring migrants","volume":"72","author":"P Becciu","year":"2018","journal-title":"Behav Ecol Sociobiol"},{"key":"pone.0352329.ref067","volume-title":"The collision risk of migrating birds at wind farms: final report VolZug project. 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