Anderson's Grass Yellow (Eurema andersonii andersonii)
The Grass Yellows from the genus Eurema, are difficult to identify when they are in flight. Although they have quite distinctive diagnostic features that distinguish the various species, it is necessary for them to stop for a closer look before they can be identified with a fair level of confidence. In this shot, taken by ButterflyCircle member Huang CJ, the single cell spot can be clearly seen to identify this butterfly as the Anderson's Grass Yellow (Eurema andersonii andersonii)
Many of the Grass Yellows' males puddle at damp roadside paths and banks of forest streams for nutrients. The puddling butterfly presents the best opportunity for a photographer to sneak up on it and take a good shot of the butterfly. When it is flying erratically it is almost futile to chase the butterfly to try to photograph it.