Also see:
- ..Scorpions(3)
- ..Seals and Sea Lions(5)
- ..Seaweeds(7)
- ..Sea Squirts(2)
- ..Sea Turtles(17)
- ..Sheep(1)
- ..Shorebirds, Gulls, Auks, and Allies(3)
- ..Shrimps(3)
- ..Sirenia(3)
- ..Skates(7)
- ..Slugs(16)
- ..Snakes(15)
- ..Snow Leopards(1)
- ..Spiders(13)
- ..Springtails(1)
- ..Squid(4)
- ..Squirrels(4)
- ..Stick Insects(2)
- ..Sunspiders(1)
- ..Swallows and Martins(2)
- ..Swans(1)
- ..Swifts(5)