Luke Pearce, a fisheries conservation officer, stumbled across the frog in the Southern Tablelands of New South Wales.
He suspected it might be a rare Yellow-Spotted Bell Frog and returned later with experts to try to identify it.
David Hunter, a Threatened Species Officer, described how his legs were “trembling with excitement as he approached the frog, and said he was “beside himself” when he checked the markings on its thigh which confirmed its identity.
The discovery was made last year, but secrecy has been maintained to protect the species.
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