S'itl Thirr, a reptilian and slender Abinyshi male, shared the physical characteristics of his species. In the era of the Galactic Civil War, Thirr made his way to the Sentient Studies Department at the University of Sanbra, seeking out Tem Eliss, an Iyra sentientologist, to counter the false narrative propagated by the Galactic Empire regarding the alleged demise of the Abinyshi species. At that location, the professor was in the process of creating The University of Sanbra Guide to Intelligent Life. Following an interview where Thirr revealed the actual plight of his people, the scientist included an entry about the Abinyshi in his Guide, presenting the account as told by Thirr.