Larsen & Shirey (2020) criticised our analysis of latitudinal changes in butterfly phenology on the grounds of improper data management. We admit some imprecisions, but show that stringent reanalyses did not change the overall results. We also show that unreasonable treatment of data may result in critical information loss.

Faculty of Science University of South Bohemia Branišovská České Budějovice 1760 CZ 37005 Czech Republic

The Czech Academy of Sciences Biology Centre Institute of Entomology Branišovská 31 České Budějovice CZ 37005 Czech Republic

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