| Latin | English | Esperanto |
|---|---|---|
| Salmo | trout | truto |
| Salmo gairdnerii | rainbow trout | ĉielarka truto |
| Salmo trutta | brown trout | bruna truto |
| Santalum acuminatum | quandong | Aŭstralia santalo |
| Sarcophilus harrisii | Tasmanian devil | sarkofilo |
| Sarda australis | bonito | sardo |
| Sassafras oficinalis | sassafras | sasafraso |
| Schinus areira | schinus | skino |
| Scirpus lacustris | clubrush | skirpo |
| Scleropages jardini | barramundi | skleropago ; baramando |
| Scythrops novaehollandiae | channelbill cuckoo | ŝanelbeka kukolo |
| Setonix brachyurus | quokka | setonigo |
| Sida rhombifolia | Paddy's lucerne | rombfolia malvo |
| Signigobius biocellatus | mudskipper | okulnaĝila gobiuso |
| Soliva sessilis | onehunga weed; prickleweed | gazona pikherbo |
| Sonchus oleraceus | puha | Maoria brasiko |
| Sophora tetraptera | kowhai | flava soforo |
| Sphenodon punctatus | tuatara | sfenodono |
| Sphyraena novaehollandiae | barracuda | barakudo |
| Spinifex sericeus | silvery spinifex | arĝenta spinifekso |
| Sterna | tern | ŝterno |
| Sterna albifrons | little tern | malgranda ŝterno |
| Sterna anaethetus | bridle tern | brida ŝterno |
| Sterna bergii | crested tern | tufa ŝterno |
| Sterna caspia | caspian tern | kaspia ŝterno |
| Sterna dougalli | roseate tern | ruĝeta ŝterno |
| Sterna fuscata | sooty tern | fulga ŝterno |
| Sterna hirudo | common tern | hirunda ŝterno |
| Sterna nereis | fairy tern | feina ŝterno |
| Sterna paradisaea | arctic tern | arkta ŝterno |
| Sterna striata | white-front tern | stria ŝterno |
| Sterna sumatrana | blacknape tern | nigranuka ŝterno |
| Stipiturus | emu-wren | stipituro |
| Stipiturus malachurus | southern wren | suda stipituro |
| Stipiturus ruficeps | rufous-crown wren | ruĝkrona stipituro |
| Strepera | currawong | strepero |
| Strepera fuliginosa | black currawong | nigra strepero |
| Strepera graculina | pied currawong | piga strepero |
| Strepera versicolor | grey currawong | griza strepero |
| Streptopelia | turtle dove | turto |
| Streptopelia chinensis | spotted turtle dove | makula turto |
| Streptopelia senegalensis | laughing turtle dove | rida turto |
| Strigops habroptilus | kakapo | strigopa papago |
| Struthidea cinerea | apostle bird | apostolobirdo |
| Sturnus vulgaris | speckled starling | makuleta starling |
| Synaptura nigra | sole | nigra soleo |