Er...um...butterflies, yeah, that's it. And moths. And a few other assorted insects for good measure.
Despite appearing similar at first glance, butterflies and moths are quite different. Unlike moths, butterflies have keen eyesight but no ears. This is probably why butterflies tend to be much more colorful (because sight rather than sound and smell are used to identify mates). Most moths never eat, living instead off stored fat from their prior life stages, whereas butterflies feed heavily on nectar. Butterflies are active during the day but rest at night whereas moths rule the night. Finally, butterflies rarely attack Tokyo.