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Large blue butterfly (Maculinea arion) on a Common Centaury (Centaurium erythraea) flower, Collard Hill, Somerset, England, UK, June 2011. Did you know? The large blue's life cycle is dependent on the larva hibernating in the nest of a species of red ant, where it feasts on ant grubs.. (KEYSTONE/NATURE PICTURE LIBRARY/Ross Hoddinott / 2020VISION)