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. 2020 Jun 16;10:9798. doi: 10.1038/s41598-020-66115-5

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© The Author(s) 2020

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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Spectrogram image of 3-minute averaged spectra extracted from the 2015 French colony 22 dataset, representing the occurrences of queen piping recorded within a colony with an original queen that was left unclipped and was left undisturbed throughout its swarming activities between 13^th and 22^nd April 2015. Midnight of each day begins at each date label on the horizontal axis. Pixel intensity represents logarithmic spectral amplitude from low (blue) to high (red) in arbitrary units. This figure was created using the MATLAB (R2018b) software (uk.mathworks.com).