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BRIMSTONE BUTTERFLY (GONEPTERYX RHAMNI) PUPA ABOUT TO HATCH, SURREY, ENGLAND, JULY. SEQUENCE 1 OF 8.

Brimstone butterfly (Gonepteryx rhamni) pupa about to hatch, Surrey, England, July. Sequence 1 of 8.. (KEYSTONE/NATURE PICTURE LIBRARY/Kim Taylor)