- salamander, tiger
- sawfishes
- scorpion, emperor
- sea lion, California
- seahorses
- seal, crabeater
- seal, harbor
- seal, hooded
- seal, leopard
- seal, Ross
- seal, Weddell
- seals, monk
- sergeant major
- serval
- shark, bonnethead
- shark, epaulette
- shark, great white
- shark, leopard
- shark, nurse
- shark, Pacific blacktip reef
- shark, whale
- sharks
- sheep, Barbary
- sheep, domestic
- shelduck, Australian
- shelduck, cape
- shoveler, Argentine red
- shoveler, Australian
- shoveler, common
- skink, Eastern blue-tongued
- sloth, Hoffman's two-toed
- sloth, Linné's two-toed
- snake, black rat
- snake, Eastern corn
- snake, Eastern indigo
- snake, Eastern king
- snake, Florida cottonmouth
- snake, Florida king
- snake, Florida pine
- snake, gray rat
- snake, scarlet king
- snake, yellow rat
- snakes
- snakes, sea
- spadefish, Atlantic
- spiders
- starling, golden-breasted
- starling, Jerdon's
- stilt, black-necked
- stork, Abdim's
- stork, marabou
- sugar glider
- sunbittern
- swan, black
- swan, black-necked
- swan, Coscoroba
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