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. 2020 Mar 26;7:102. doi: 10.1038/s41597-020-0442-6

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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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Fig. 3 — Image data from a Gentoo Penguin (Pygoscelis papua) colony at George’s Point, Antarctic Peninsula. Left - Penguin Watch time-lapse image GEORa2013b_000153, captured by camera GEORa on 22/01/2013 at 16:00:00; right - the corresponding Pengbot Density Map, generated by the Pengbot convolutional neural network (CNN).