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. 2022 Jun 6;63(4):355–364. doi: 10.1007/s10329-022-00992-4

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© The Author(s) 2022

Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — The number of recorded digging-related behaviours [peering at well-digging (Observing), play digging, digging, and well-digging] across the dry seasons 2012/2013 to 2018/2019. No well-digging was observed before 2014/2015; three well-digging events were recorded in 2016/2017, fourteen in 2017/2018, and eight in 2018/2019. Digging and play digging were recorded from 2012/2013; there were no recorded digging-related events of any kind in 2013/2014