People should stop wasting time and money looking for the Tasmanian tiger, according to new Australian research.
Dr Diana Fisher and Dr Simon Blomberg from the University of Queensland's school of biological sciences report their findings in a recent issue of Conservation Biology.
Since the last wild thylacine was captured in 1933, there have been ongoing searches and numerous unconfirmed sightings of the carnivorous marsupial.
But, says Fisher, such efforts are misguided.
"There's been more search efforts for the thylacine than any other mammal globally," she says.
"I think that's just a waste of money."