Stock Photo - The cocoon of a Swallowtail butterfly is prepared at the Tropenschauhaus of the Herrenahausen Gardens in Hanover, Germany, 16 January 2018. From the 26th of January until the 18th of March 2018 over 1000 butterflies from 60 different species will be presented under the title ""Gaukler der Tropen"" (lit. ""Jesters of the tropics""). Photo: Holger Hollemann/dpa. - Hanover/Lower Saxony/Germany

Stock Photo: The cocoon of a Swallowtail butterfly is prepared at the Tropenschauhaus of the Herrenahausen Gardens in Hanover, Germany, 16 January 2018.

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