Euthalia monina monina

Fabricius 1787 - The Malay Baron

Koh Samui and Koh Pha Ngan.

A most unusual species in which the male is polymorphic. It is normally females which show this particular character. Strangely, this polymorphism appears to be limited to Neomalaya only, although the species is far more widespread. A third named form, f. gardineri, which is similar to f. monina, but the blue is replaced by brown, has yet to be found on the Island.

The butterfly is very common, and can be found in forests and forest edges.

Flight Period

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50 - 70mm

Early Stages

Fully known. More detailed life history information is available from the following resources: S. Igarishi - Life Histories of Asian Butterflies, Volume.1 , Page 434.

Larval Foodplant

In Thailand, Mangifera pentandra (Anacardiaceae). Elsewhere, Clidemia hirta (Melasomataceae), Mallotus subpeltatus and Macaranga hullettii (both Euphorbiaceae) have been recorded.


Peninsular Thailand and Malaysia. Other subspecies in the rest of Thailand and N. E. India, Indo-China, throughout Sundaland and the Lesser Sunda Islands.