S. australis
# S. australis

S. australis may refer to:

* Sauromalus australis, the Peninsular chuckwalla, a lizard species found in Mexico
* Schenkia australis, an annual herb species endemic to Australia
* Scolypopa australis, the passionvine hopper, an insect species found in Australia
* Scytothamnus australis, a brown alga species found in New Zealand
* Sloanea australis, the maiden's blush, a rainforest tree species found in Australia
* Smilax australis, the lawyer vine, barbwire vine or "wait-a-while", a plant species endemic to Australia
* Soroavisaurus australis, an enantiornithine bird species that lived during the Late Cretaceous of Argentina
* Suaeda australis, the Austral seablite, a plant species native to Australia
* Syconycteris australis, the Common Blossom Bat, Southern Blossom Bat or Queensland Blossom Bat, a fruit bat species
