Elymnias caudata, Tailed Palmfly, is a species of satyrid butterfly found in South Asia.This butterfly species is dimorphic, males and females do not look alike.
Males exhibit black colored upperside forewings with small blue patches and reddish brown color on upperside hindwings, while the females mimic butterfly species of the genus Danaus.Taken at Kadavoor, Kerala, India. Original public domain image from Wikimedia Commons