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. 2019 Oct 18;9:14947. doi: 10.1038/s41598-019-51351-1

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Wind tunnel device used to measure single fly responses to food choice. Schematic representation of upwind free flight in the wind tunnel. The four flight features measured are the frequency and latency of taking upwind flight, flight duration and overall landing frequency. We also noted the preference (LF/PF) in the binary choice between food generally consisting of plain food (PF) and food labelled by flies from different lines (labelled food = LF). The wind speed and direction are indicated on the right.