I think this is indeed Common Grass Yellow. If it was Three-spot, then the three black spots on the forewing near basal should be visible as they are here: https://www.projectnoah.org/spottings/14...
The sexes are alike. The shape of the outer margin is not completely rounded on its hindwing and is wavy on forewing. The irregular black outer margin on the upper surface of its forewing is slightly different to that of the previous species. The hindwing has a thin black outer margin. Its underside is usually heavily marked in comparison to the previous species and its cell end patches are larger and have a yellow area in the middle. The basal parts of the forewing cell have three black markings. They bare the chocolate colored apical patch on the forewing more frequently than the Common Grass Yellow, and this patch is also larger.
ID Please (Three spot grass yellow?)
It's more like Common Grass Yellow... Do you possibly have a clearer pic?
I haven't seen it for myself but according to the guide I use and google, It's plain brown. This is the upper side view given in Wikipedia (bottom two pics): https://en.wikipedia.org/wiki/Elymnias_s...
Wildlife
