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Celastrina argiolus (Holly Blue) is a species of butterflies in the family gossamer-winged butterflies. They visit flowers of St. Anthony's turnip, feverfew, Purple Toadflax, and Meadow Crane's-bill. They are diurnal.

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EOL has data for 11 attributes, including:

Known occurrences, collected specimens and observations of holly blue. View this species on GBIF