Animals that start with S

What these animals are

SHEEP

woolly usually horned ruminant mammal related to the goat

SWAN

stately heavy-bodied aquatic bird with very long neck and usually white plumage as adult

SNAIL

freshwater or marine or terrestrial gastropod mollusk usually having an external…

SNAKE

limbless scaly elongate reptile

SHARK

any of numerous elongate mostly marine carnivorous fishes with heterocercal caudal fins…

SPIDER

predatory arachnid with eight legs, two poison fangs, two feelers, and usually two…

SALMON

any of various large food and game fishes of northern waters

SWINE

stout-bodied short-legged omnivorous animals

SQUIRREL

a kind of arboreal rodent having a long bushy tail

SERPENT

limbless scaly elongate reptile

SPARROW

any of several small dull-colored singing birds feeding on seeds or insects

SKUNK

American musteline mammal typically ejecting an intensely malodorous fluid when startled

STAG

a male deer, especially an adult male red deer

STALLION

uncastrated adult male horse

STORK

large mostly Old World wading birds typically having white-and-black plumage

SLOTH

any of several slow-moving arboreal mammals of South America and Central America

Short definitions from WordNet 3.1 (Princeton University).