The occurrence of an unprecedented abundance episode of Historis acheronta semele in July, 2021 in Havana, Cuba is reported. Ecological and ethological notes are made, and the possible causes and outcomes of the presence of large numbers of butterflies in the city are discussed. The absence of additional records makes it impossible to assess if the event is a migration or just a local abundance episode. The event developed during the rainy season of the Cuban climate, in coincidence with previously reported events for similar butterflies in Cuba. Nonetheless, the exact causes of this event remain unknown, as does the host plant of this butterfly in Cuba.

中文翻译：

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古巴哈瓦那 Historis acheronta semele（鳞翅目：蛱蝶科）的丰富剧集

据报道，2021 年 7 月，古巴哈瓦那发生了史无前例的 Historis acheronta semele。进行了生态和行为学记录，并讨论了城市中大量蝴蝶存在的可能原因和结果。由于没有额外的记录，因此无法评估该事件是迁移还是局部丰度事件。该事件发生在古巴气候的雨季，与之前报道的古巴类似蝴蝶事件相吻合。尽管如此，这一事件的确切原因仍然未知，这种蝴蝶在古巴的寄主植物也是如此。