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Dysphania sagana
Yellow body and wings, with a scattering of black dots across the wings and black tips with white dots on the tips of the wings.
Found just inland from a ferry dock on the warm, sunny Thai island of Koh Chang.
the most colorful moth I've ever seen in person
Geometridae, Dysphania sagana, a diurnal moth. Nice spotting. More common is Dysphania militaris:
http://en.wikipedia.org/wiki/Dysphania_m...
But you could also notice the differences: Militaris has stronger markings.