Animals

Staurozoa

Staurozoa — the stalked jellyfish: biology, classification and ecology

Stegoceras

Stegoceras — thick‑shelled pachycephalosaur of Late Cretaceous North America

Stegodon

Stegosauria

Stegosauria: plated dinosaurs of the Jurassic and Early Cretaceous

Stegosaurus

Stegosaurus — the plated Late Jurassic herbivore

Steller's sea cow

Stenonychosaurus

Stenopterygius

Steppe bison

Steppe bison (Bison priscus): Pleistocene grazing megafauna

Steropodon

Steropodon — an early Australian monotreme from the Lower Cretaceous

Stick insect

Stick insect (Phasmatodea): camouflage, biology and diversity

Stickleback

Stingray

Stoat

Stone dormouse

Stone dormouse (Graphiurus rupicola)

Stork

Stork (Ciconiidae): Biology, Behavior, Species and Conservation

Stotting

Stotting (pronking): the high jump display of antelopes and ungulates

Strabomantidae

Strabomantidae — Neotropical terrestrial frogs with direct development

Strepsiptera

Strepsiptera — twisted‑wing parasitic insects

Strepsirrhini

Strepsirrhini — the wet-nosed primates

Striped dolphin

Striped Dolphin (Stenella coeruleoalba)

Striped hyaena

Striped hyaena: description, behaviour, range and cultural role

Struthiomimus

Struthiomimus — an ostrich-like ornithomimid dinosaur

Stud (animal)

Stud (animal): male breeding animals and stud farm management

Sturgeon

Sturgeon (family Acipenseridae)

Stygimoloch

Stygimoloch — a spiked pachycephalosaur from the Late Cretaceous

Styracosaurus

Styracosaurus — horned ceratopsian of the Late Cretaceous

Subclass

Subclass (classification and programming)

Subspecies

Suchomimus

Suchomimus: spinosaurid theropod of the Early Cretaceous

Suchosaurus

Suchosaurus — the "crocodile lizard" (Cretaceous theropod)

Sugar glider

Sugar glider (Petaurus breviceps) — small gliding marsupial

Suidae

Suina

Suina (suiform mammals)

Suinae

Suinae — the pig subfamily (Sus and close relatives)

Sulphur-crested cockatoo

Sumatran rhinoceros

Sumatran rhinoceros (Dicerorhinus sumatrensis)

Sumatran tiger

Sumatran tiger (Panthera tigris sumatrae)

Sun bear

Sun bear (Helarctos malayanus)

Sunda clouded leopard

Sunda clouded leopard (Neofelis diardi)

Superb bird-of-paradise

Superb fairy-wren

Superb lyrebird

Superclass (biology)

Superclass (biology): meaning, place in taxonomy and usage

Supersaurus

Supersaurus — a giant diplodocid sauropod of the Morrison Formation

Surinam horned toad

Surinam horned toad (a South American horned frog)

Swallow

Swallow (Hirundinidae): overview of aerial insectivorous passerines

Swallowtail butterfly

Swallowtail butterfly (family Papilionidae)