Silvery Woolly Monkey 
Sitatunga 
Six-banded armadillo 
Slender mongoose 
Slender squirrel 
Slender-tailed dunnart 
Sloth bear 
Small Asian mongoose 
Small Indian Civet 
Small mouse-tailed bat 
Small-toothed Palm Civet 
Smaller horseshoe bat 
Smiths Bush Squirrel 
Smooth-coated otter 
Snow leopard 
Snowshoe hare 
Somali wild ass 
Sömmerring's Gazelle 
Sorensen's leaf-nosed bat 
South African springhare 
South American Coati 
South American gray fox 
South American Sea Lion 
South American tapir