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. 2018 Apr 19;8:5464. doi: 10.1038/s41598-018-23670-2

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© The Author(s) 2018

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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Imaging of the bubbling behaviour in the blowfly, Chrysomya megacephala. (A), Digital image of a fly holding a droplet of crop fluid with its mouthparts. (B), X-ray microtomography of a fly´s cephalic region showing mouthparts and the path of the fluid tidal movements (arrows). (C), Infrared side view imaging of a blowfly moving a droplet outward (top panel) and inward (lower panel) (T = time). (D), Infrared dorsal view of a group of 4 flies in which one of them (lower right) is moving a droplet. Movies showing the behaviour are provided in the Supplementary Information Videos 1–5.