Eurema blanda blanda

Boisduval 1836 - The Three-Spot Grass Yellow

Koh Samui only. Its absence from Koh Pha Ngan is likely due only to misidentification.

There are six members of the Eurema genus on the Islands. They are all very similar, and it is nearly impossible to identify most of them on the wing. The main differences between the species are a) the number of spots in the underside forewing cell, combined with b) the shape of the upperside forewing black markings and c) the shape of the apical area markings on the forewing underside. As the English name suggests, this species should be looked for on grasslands, and other open spaces.

This species is of medium size, has three cell spots, with the black forewing border deeply excavated.

A very common species on Samui.

Flight Period



35 - 45mm

Early Stages

Fully known. More detailed life history information is available from the following resources: S. Igarishi - Life Histories of Asian Butterflies, Volume.2 , Page 373.

Larval Foodplant

A wide range of plants. Various species of Apocynaceae, Mimosaceae, Caesapliniaceae and Papilionaceae.


Peninsular Thailand and Malaysia, Borneo, Sumatra and Java. Other subspecies throughout Asia from Sri Lanka in the South-West to Japan in the North and New Guinea to the East.