'Papilio memnon', The Great Mormon, is a large butterfly native to southern Asia that belongs to the swallowtail family. It is widely distributed and has thirteen subspecies. The female is polymorphic and with mimetic forms.

The butterfly is large with a 120 to 150 millimetres (4.7 to 5.9 in) span. It has four male and many female forms, the females being highly polymorphic and many of them being mimics of unpalatable butterflies. This species has been studied extensively for understanding the genetic basis for polymorphy and Batesian mimicry. As many as twenty-six female forms are reported.

This butterfly is found in forest clearings. It is very common and is also seen amongst human habitation. It visits flowers of 'Poinsettia', 'Jasminum', 'Lantana', 'Canna' and 'Salvia'. It usually flies 2 to 4 metres (6 ft 7 in to 13 ft 1 in) above the ground. The butterfly is known to mud-puddle. (By sipping moisture from mud puddles, butterflies take in salts and minerals from the soil. This behavior is called mud-puddling.) The males are much more common than females.

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