Regal Moth

Some moths can be even more colourful than butterflies, and bigger also. The difference is in the antennae, Butterflies have a small or a long blob at the antennae tip while those of moths don't but often look like miniature feathers with a close inspection. In addition butterflies rest with wings fully open revealing all four uppersides or folded together upwards revealing only the undersides which may be a totally different colour; moths rest with wings folded backwards and/or downwards and rarely show the hindwings, which are often a different colour if they are seen.

This is a moth, not a butterfly.