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Elements were identified based on visual examination of their population dynamics over the five years of the study (Methods, Fig. 1 and Extended Data Fig. 3). ‘Y’, ‘N’, and ‘nd’, denote periods when a putative element was visible, invisible, or was not determined (because of insufficient data), respectively.
a Each taxon has its own ‘element header’ with the typical month in which an element was observed. Species-specific elements are shown in colour. Underlined elements were supported statistically (text, Methods and Fig. 2).