Charaxes bernadus crepax

Fruhstorfer 1914 - The Tawny Rajah

Koh Samui and Koh Pha Ngan.

This species is to be commonly found at the edges of rivers within forested areas. The males are strongly territorial, and it is usual to see two or more males having 'dogfights' before returning to their favourite perches. They are very fast and strong flyers. Females are rarely seen, and prefer to keep to the top of the forest canopy.

Flight Period



60 - 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 445.

Larval Foodplant

Acronychia pedunculata (Rutaceae), Adenathera pavonina (Mimosaceae), Litsea glutinosa (Lauraceae)


Peninsular Thailand and mainland Malaysia. Other subspecies in N.E. India, Burma and Thailand. Also Indo-China, S. China, and throughout Sundaland.