This story and it’s images are courtesy of “October 2020 Biosecurity Queensland Newsletter”, compiled and published by the Department of Agriculture and Fisheries (www.daf.qld.gov.au)
Red-eared slider turtles (Trachemys scripta elegans) are aggressive, will out-compete native species for food and can carry diseases that will threaten native turtles, such as the endangered Mary River Turtle.
There is a single known population of red-eared slider turtles in Queensland, where we’ve been working to remove them. Research is being undertaken to improve the effectiveness of surveillance techniques, including the use of DNA analysis and automated surveillance platforms – one of which took this image! 
If you wish to view the full DAF Fact Sheet on these turtles, please click here.
If you see one of these turtles anywhere, please take a clear photo and note the details of the exact location in which you sighted it, before calling the Department of Agriculture and Fisheries Biosecurity Team on 13 25 23.