This September 7th marks the 80th anniversary of the extinction of the thylacine, also known as the Tasmanian tiger. Or at least, that’s the date that has been agreed upon in official sources as the extinction date.
I took up the issue of dating the thylacine’s extinction in my recently published article “Presence of absence, absence of presence, and extinction narratives” in the volume Nature, Temporality and Environmental Management: Scandinavian and Australian Perspectives on Landscapes and Peoples. The question is whether or not the absence of evidence of live thylacines should be interpreted as the absence of thylacines. This proves a more challenging question to answer than you might think.