Eurema andersoni andersoni

Moore 1886 - The Anderson's Grass Yellow

Koh Samui only.

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 small size for the group, has a single cell spot, with the black forewing border deeply excavated and slightly inclined towards the tornus below vein 2. Underside forewing apical area NOT darkened.

An apparently rare species on Samui, but this may be due to mis-identification in the field.

Flight Period

x         x           


35 - 40mm

Early Stages

Fully known. More detailed life history information is available from the following resource: ButterflyCircle Blog (courtesy of Dr. Horace Tan.)

Larval Foodplant

Various Rhamnaceae


Peninsular Thailand, Mainland Malaysia, Borneo and Sumatra. Other subspecies in India, Burma, Indo-China, S. China, Taiwan, Java and Palawan (Philippines)