My son-in-law found a turtle carcass whilst we were kayaking at the Globe Derby wetlands last month.
I was able to take a couple of photos of the dead turtle before returning it to the horrible black water that we had found it in.
I posted the two photos to iNaturalist in order to get the turtle identified. It has so far been identified as being an Eastern Snake-necked Turtle, Chelodina longicollis. Details about this species can be found at https://inaturalist.ala.org.au/taxa/39598-Chelodina-longicollis .
More than 250 sightings of this turtle have been recorded in South Australia through iNaturalist.
According to https://inaturalist.ala.org.au/taxa/39598-Chelodina-longicollis , “The eastern long-necked turtle (Chelodina longicollis), also known as the common long-necked turtle and common snake-necked turtle, is an east Australian species of snake-necked turtle that inhabits a wide variety of water bodies and is an opportunistic feeder. It is a side-necked turtle (Pleurodira), meaning that it bends its head sideways into its shell rather than pulling it directly back. ….. Chelodina longicollis is a species of freshwater turtle”.
My posting to iNaturalist was somewhat duplicated. Some comments can be found at Eastern Snake-necked Turtle (Chelodina longicollis) from Adelaide SA, Australia on August 8, 2025 at 11:31 AM by Steve Reynolds. Found deceased in wetland waterway · iNaturalist Australia