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Euchloe penia, commonly known as the eastern greenish black-tip, is a butterfly in the family Pieridae. It is found in North Macedonia, Bulgaria, Greece, Turkey, Lebanon, Syria, and northern Iraq. The habitat consists of dry and warm rocky areas. Adults are a bright greenish off-yellow, with a wingspan of 32 to 36 millimetres (1.3 to 1.4 inches). There are two generations per year, with adults on wing in April and from June to July. The larvae feed on plants of the genus Matthiola. This E. penia butterfly perching on a flower was photographed in Pletvar, North Macedonia.Photograph credit: Charles J. Sharp