One-spotted Prepona 
Onega clearwing 
Optimandes eugenia 
Orange admiral 
Orange Alpine Xenica 
Orange Banner 
Orange Bushbrown 
Orange Cracker 
Orange Lacewing 
Orange oakleaf 
Orange Ringlet 
Orange-banded Plane 
Orange-bodied Altinote 
Orange-patched Crescent 
Orange-washed Sister 
Oriental meadow brown 
Orion Cecropian 
Orophila diotima 
Oxeoschistus pronax 
Oxeoschistus simplex 
Pachmarhi bushbrown 
Pacific fritillary 
Painted Crescent 
Painted Lady