Eurema ada iona
Just to further elaborate on why certain species are really difficult to ID accurately from field shots, here are two shots of an actual specimen of Eurema ada iona from the Q-Museum.
This specimen was taken in Malaysia in the 90's. Check closely the characteristics and also C&P4's ID Key.
One of these days, I'll have to put the specimens side by side with the others so that the relative sizes can also be compared. The dimunitive size of this specimen is not apparent, unless a ruler is put to give some scale, or it is shot together with the other larger Grass Yellow specimens. This one is about 18mm wingspan.
For these lookalike species, a voucher specimen is almost critical for ID. On scientific accuracy, field shots are usually avoided. This was also the advice of the late Col John Eliot (of the C&P4 fame) and Dr Laurence Kirton, when asked to ID specimens.
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