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Formica polyctena workers active on their mound surface in winter, keeping nest entrances open. Photo taken on 11.01.2015 (Wojciech Stephan). |
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| Part of: Czechowski W, Rutkowski T, Stephan W, Vepsäläinen K (2016) Living beyond the limits of survival: wood ants trapped in a gigantic pitfall. Journal of Hymenoptera Research 51: 227-239. https://doi.org/10.3897/jhr.51.9096 |