T. australis

T. australis may refer to:
 * Tadarida australis, the white-striped free-tailed bat, a bat species found in Australia, Indonesia and Papua New Guinea
 * Telmatobufo australis, a frog species endemic to Chile
 * Terminalia australis, a large shrub or tree species found in Argentina, Paraguay and Uruguay
 * Treron australis, a pigeon