Eurema brigitta hainana

Moore 1878 - The Small Grass Yellow

Koh Samui and Koh Pha Ngan.

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 no cell spots, with the black forewing markings not deeply excavated as with all other species, but lightly scalloped, and has no underside apical markings.

This is not an uncommon species on the Islands.

Flight Period

x       xxx    x x 


28 - 45mm

Early Stages

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

Larval Foodplant

Cassia mimosoides and other Luguminoseae


Africa, Saudi Arabia, Sri Lanka, India, throughout tropical S. E. Asia to New Guinea and Australia.