Small greasy 
Small Heath 
Small mountain ringlet 
Small pearl-bordered fritillary 
Small Three-ringed Butterfly 
Small Tortoiseshell 
Small wood-nymph or dark wood-nymph 
Smaller wood nymph 
Smooth-banded sister 
Soldier 
Soldier pansy 
South American Tropical Buckeye 
South China Bushbrown 
South Indian Blue Oakleaf 
Southern comma 
Southern gatekeeper 
Southern monarch 
Southern Pearly Eye 
Southern sullied sailer 
Southern White Admiral 
Spanish Fritillary 
Spanish gatekeeper 
Spanish marbled white 
Speckled wood