Orange-Patched Smoky Moth 
Orange-spot Duke 
Orange-spotted carpet moth 
Orange-spotted Sunmoth 
Orange-tail awlet 
Orange-tipped Pea-Blue 
Orange-washed Sister 
Orangestriped oakworm 
Orchard Ermine 
Orchard swallowtail butterfly 
Orcus Checkered-Skipper 
Orcus chequered skipper 
Oreana unicolorella 
Oreta fulgens 
Oreta fuscopurpurea 
Oreta insignis 
Oreta subvinosa 
Organopoda acmaea 
Oriental meadow brown 
Oriental orange banded green geometer moth 
Orientozeuzera rhabdota 
Origo Groundstreak 
Orion Cecropian 
Orizaba Silkmoth